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Future

Future

Overview
The future is the indefinite time period after the present
Present
Present is a time that is neither past nor future.Present may also refer to:- Time and timing :* Present tense, the grammatical tense of a verb* Before Present, radiocarbon dates relative to AD 1950* Presenting, a medical term* Presenteeism...

. Its arrival is considered inevitable
Inevitable
In the Dungeons & Dragons role-playing game, inevitables are extraplanar magical constructs.-Publication history:The marut first appeared in the first edition in the original Manual of the Planes ....

 due to the existence of time
Time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

 and the laws of physics. Due to the nature of the reality
Reality
In philosophy, reality is the state of things as they actually exist, rather than as they may appear or might be imagined. In a wider definition, reality includes everything that is and has been, whether or not it is observable or comprehensible...

 and the unavoidability of the future, everything that currently exists and will exist
Exist
Exist may refer to:* eXist, an open source database management system built on XML* Existence* Energetic X-ray Survey Telescope, a proposed hard X-ray imaging all-sky deep survey mission...

 is temporary
Temporary
Temporary may refer to:Computing* Temporary variable* Temporary file* Temporary folder* Temporary filesystemOther uses* Temporary work, a common working arrangement...

 and will come to an end. The future and the concept of eternity
Eternity
While in the popular mind, eternity often simply means existence for a limitless amount of time, many have used it to refer to a timeless existence altogether outside time. By contrast, infinite temporal existence is then called sempiternity. Something eternal exists outside time; by contrast,...

 have been major subjects of philosophy
Philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

, religion
Religion
Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...

, and science
Science
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe...

 and defining them non-controversially has consistently eluded the greatest of minds. It is the opposite of the past
Past
Most generally, the past is a term used to indicate the totality of events which occurred before a given point in time. The past is contrasted with and defined by the present and the future. The concept of the past is derived from the linear fashion in which human observers experience time, and is...

, and is the time
Time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

 after the present
Present
Present is a time that is neither past nor future.Present may also refer to:- Time and timing :* Present tense, the grammatical tense of a verb* Before Present, radiocarbon dates relative to AD 1950* Presenting, a medical term* Presenteeism...

. In the Occidental
Western culture
Western culture, sometimes equated with Western civilization or European civilization, refers to cultures of European origin and is used very broadly to refer to a heritage of social norms, ethical values, traditional customs, religious beliefs, political systems, and specific artifacts and...

 view, which uses a linear conception of time
Time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

, the future is the portion of the projected time line that is anticipated to occur. In special relativity
Special relativity
Special relativity is the physical theory of measurement in an inertial frame of reference proposed in 1905 by Albert Einstein in the paper "On the Electrodynamics of Moving Bodies".It generalizes Galileo's...

 the future is considered to be absolute future or the future light cone
Light cone
A light cone is the path that a flash of light, emanating from a single event and traveling in all directions, would take through spacetime...

. In physics, time is considered to be the fourth dimension
Dimension
In physics and mathematics, the dimension of a space or object is informally defined as the minimum number of coordinates needed to specify any point within it. Thus a line has a dimension of one because only one coordinate is needed to specify a point on it...

 of the universe.
Discussion
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Quotations

"Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present." --Marcus Aurelius Antoninus Meditations

"Take hold of the future or the future will take hold of you - be futurewise." -- Patrick Dixon, Futurist and author Futurewise 1998/2005

"For I dipt into the future, far as human eye could see, saw the vision of the world, and all the wonder that would be." --Alfred Tennyson|Alfred Lord Tennyson

"I've seen the future, brother; it is murder." --Leonard Cohen, The Future

"To-morrow, and to-morrow, and to-morrow, creeps in this petty pace from day to day, to the last syllable of recorded time; and all our yesterdays have lighted fools the way to dusty death. Out, out, brief candle! Life's but a walking shadow, a poor player that struts and frets his hour upon the stage, and then is heard no more; it is a tale told by an idiot, full of sound and fury, signifying nothing." -- Macbeth" by William Shakespeare

"No eyes can read the future, because it is a book not yet written!" --Mehmet ildan, Quotations

"Future is an unknown country which requires tough visas for anyone to enter. Not all of us will get the chance to visit it." --Mehmet ildan, Quotations

"People ask me to predict the future, when all I want to do is prevent it. Better yet, build it. Predicting the future is much too easy, anyway. You look at the people around you, the street you stand on, the visible air you breathe, and predict more of the same. To hell with more. I want better." ~ Ray Bradbury Beyond 1984: The People Machines

Encyclopedia
The future is the indefinite time period after the present
Present
Present is a time that is neither past nor future.Present may also refer to:- Time and timing :* Present tense, the grammatical tense of a verb* Before Present, radiocarbon dates relative to AD 1950* Presenting, a medical term* Presenteeism...

. Its arrival is considered inevitable
Inevitable
In the Dungeons & Dragons role-playing game, inevitables are extraplanar magical constructs.-Publication history:The marut first appeared in the first edition in the original Manual of the Planes ....

 due to the existence of time
Time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

 and the laws of physics. Due to the nature of the reality
Reality
In philosophy, reality is the state of things as they actually exist, rather than as they may appear or might be imagined. In a wider definition, reality includes everything that is and has been, whether or not it is observable or comprehensible...

 and the unavoidability of the future, everything that currently exists and will exist
Exist
Exist may refer to:* eXist, an open source database management system built on XML* Existence* Energetic X-ray Survey Telescope, a proposed hard X-ray imaging all-sky deep survey mission...

 is temporary
Temporary
Temporary may refer to:Computing* Temporary variable* Temporary file* Temporary folder* Temporary filesystemOther uses* Temporary work, a common working arrangement...

 and will come to an end. The future and the concept of eternity
Eternity
While in the popular mind, eternity often simply means existence for a limitless amount of time, many have used it to refer to a timeless existence altogether outside time. By contrast, infinite temporal existence is then called sempiternity. Something eternal exists outside time; by contrast,...

 have been major subjects of philosophy
Philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

, religion
Religion
Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...

, and science
Science
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe...

 and defining them non-controversially has consistently eluded the greatest of minds. It is the opposite of the past
Past
Most generally, the past is a term used to indicate the totality of events which occurred before a given point in time. The past is contrasted with and defined by the present and the future. The concept of the past is derived from the linear fashion in which human observers experience time, and is...

, and is the time
Time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

 after the present
Present
Present is a time that is neither past nor future.Present may also refer to:- Time and timing :* Present tense, the grammatical tense of a verb* Before Present, radiocarbon dates relative to AD 1950* Presenting, a medical term* Presenteeism...

. In the Occidental
Western culture
Western culture, sometimes equated with Western civilization or European civilization, refers to cultures of European origin and is used very broadly to refer to a heritage of social norms, ethical values, traditional customs, religious beliefs, political systems, and specific artifacts and...

 view, which uses a linear conception of time
Time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....

, the future is the portion of the projected time line that is anticipated to occur. In special relativity
Special relativity
Special relativity is the physical theory of measurement in an inertial frame of reference proposed in 1905 by Albert Einstein in the paper "On the Electrodynamics of Moving Bodies".It generalizes Galileo's...

 the future is considered to be absolute future or the future light cone
Light cone
A light cone is the path that a flash of light, emanating from a single event and traveling in all directions, would take through spacetime...

. In physics, time is considered to be the fourth dimension
Dimension
In physics and mathematics, the dimension of a space or object is informally defined as the minimum number of coordinates needed to specify any point within it. Thus a line has a dimension of one because only one coordinate is needed to specify a point on it...

 of the universe.

In the philosophy of time, presentism
Presentism (philosophy of time)
Saint Augustine proposed that the present is a knife edge between the past and the future and could not contain any extended period of time. This seems evident because, if the present is extended, it must have separate parts - but these must be simultaneous if they are truly part of the present...

 is the belief
Belief
Belief is the psychological state in which an individual holds a proposition or premise to be true.-Belief, knowledge and epistemology:The terms belief and knowledge are used differently in philosophy....

 that only the present exists
Existence
In common usage, existence is the world we are aware of through our senses, and that persists independently without them. In academic philosophy the word has a more specialized meaning, being contrasted with essence, which specifies different forms of existence as well as different identity...

 and the future and the past
Past
Most generally, the past is a term used to indicate the totality of events which occurred before a given point in time. The past is contrasted with and defined by the present and the future. The concept of the past is derived from the linear fashion in which human observers experience time, and is...

 are unreal
Reality
In philosophy, reality is the state of things as they actually exist, rather than as they may appear or might be imagined. In a wider definition, reality includes everything that is and has been, whether or not it is observable or comprehensible...

. Religions consider the future when they address issues such as karma
Karma
Karma in Indian religions is the concept of "action" or "deed", understood as that which causes the entire cycle of cause and effect originating in ancient India and treated in Hindu, Jain, Buddhist and Sikh philosophies....

, life after death
Afterlife
The afterlife is the belief that a part of, or essence of, or soul of an individual, which carries with it and confers personal identity, survives the death of the body of this world and this lifetime, by natural or supernatural means, in contrast to the belief in eternal...

, and eschatologies
Eschatology
Eschatology is a part of theology, philosophy, and futurology concerned with what are believed to be the final events in history, or the ultimate destiny of humanity, commonly referred to as the end of the world or the World to Come...

 that study what the end of time and the end of the world will be. Religious figures have claimed to see into the future, such as prophet
Prophet
In religion, a prophet, from the Greek word προφήτης profitis meaning "foreteller", is an individual who is claimed to have been contacted by the supernatural or the divine, and serves as an intermediary with humanity, delivering this newfound knowledge from the supernatural entity to other people...

s and diviners
Divination
Divination is the attempt to gain insight into a question or situation by way of an occultic standardized process or ritual...

. Organized efforts to predict
Prediction
A prediction or forecast is a statement about the way things will happen in the future, often but not always based on experience or knowledge...

 or forecast
Forecasting
Forecasting is the process of making statements about events whose actual outcomes have not yet been observed. A commonplace example might be estimation for some variable of interest at some specified future date. Prediction is a similar, but more general term...

 the future may have derived from observations by early man of heavenly objects.

Future studies, or futurology
Futurology
Futures studies is the study of postulating possible, probable, and preferable futures and the worldviews and myths that underlie them. There is a debate as to whether this discipline is an art or science. In general, it can be considered as a branch under the more general scope of the field of...

, is the science, art and practice of postulating possible futures. Modern practitioners stress the importance of alternative and plural futures, rather than one monolithic future, and the limitations of prediction and probability, versus the creation of possible and preferable futures.

In art and culture, the future was explored in several art movements and genres. The futurism
Futurism
Futurism was an artistic and social movement that originated in Italy in the early 20th century.Futurism or futurist may refer to:* Afrofuturism, an African-American and African diaspora subculture* Cubo-Futurism* Ego-Futurism...

 art
Art
Art is the product or process of deliberately arranging items in a way that influences and affects one or more of the senses, emotions, and intellect....

 movement
Art movement
An art movement is a tendency or style in art with a specific common philosophy or goal, followed by a group of artists during a restricted period of time, or, at least, with the heyday of the movement defined within a number of years...

 at the beginning of the 20th century explored every medium of art, including painting
Painting
Painting is the practice of applying paint, pigment, color or other medium to a surface . The application of the medium is commonly applied to the base with a brush but other objects can be used. In art, the term painting describes both the act and the result of the action. However, painting is...

, sculpture
Sculpture
Sculpture is three-dimensional artwork created by shaping or combining hard materials—typically stone such as marble—or metal, glass, or wood. Softer materials can also be used, such as clay, textiles, plastics, polymers and softer metals...

, poetry
Poetry
Poetry is a form of literary art in which language is used for its aesthetic and evocative qualities in addition to, or in lieu of, its apparent meaning...

, theatre
Theatre
Theatre is a collaborative form of fine art that uses live performers to present the experience of a real or imagined event before a live audience in a specific place. The performers may communicate this experience to the audience through combinations of gesture, speech, song, music or dance...

, music
Music
Music is an art form whose medium is sound and silence. Its common elements are pitch , rhythm , dynamics, and the sonic qualities of timbre and texture...

, architecture
Architecture
Architecture is both the process and product of planning, designing and construction. Architectural works, in the material form of buildings, are often perceived as cultural and political symbols and as works of art...

 and even gastronomy
Gastronomy
Gastronomy is the art or science of food eating. Also, it can be defined as the study of food and culture, with a particular focus on gourmet cuisine...

. Futurists had passionate loathing of ideas from the past, especially political and artistic traditions. Instead, they espoused a love of speed
Speed
In kinematics, the speed of an object is the magnitude of its velocity ; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as...

, technology
Technology
Technology is the making, usage, and knowledge of tools, machines, techniques, crafts, systems or methods of organization in order to solve a problem or perform a specific function. It can also refer to the collection of such tools, machinery, and procedures. The word technology comes ;...

, and violence
Violence
Violence is the use of physical force to apply a state to others contrary to their wishes. violence, while often a stand-alone issue, is often the culmination of other kinds of conflict, e.g...

. Futuristic music involved homage to, inclusion of, or imitation of machines. Futurism expanded to encompass other artistic domains and ultimately included industrial design, textiles, and architecture.

Forecasting



Organized efforts to predict
Prediction
A prediction or forecast is a statement about the way things will happen in the future, often but not always based on experience or knowledge...

 or forecast
Forecasting
Forecasting is the process of making statements about events whose actual outcomes have not yet been observed. A commonplace example might be estimation for some variable of interest at some specified future date. Prediction is a similar, but more general term...

 the future may have derived from observations by early humans of heavenly objects, which changed position in predictable patterns. The practice of astrology
Astrology
Astrology consists of a number of belief systems which hold that there is a relationship between astronomical phenomena and events in the human world...

, today considered pseudoscience
Pseudoscience
Pseudoscience is a claim, belief, or practice which is presented as scientific, but which does not adhere to a valid scientific method, lacks supporting evidence or plausibility, cannot be reliably tested, or otherwise lacks scientific status...

, evolved from the human desire to forecast the future. Much of physical science
Physical science
Physical science is an encompassing term for the branches of natural science and science that study non-living systems, in contrast to the life sciences...

 can be read as an attempt to make quantitative and objective predictions about events.

Forecasting
Forecasting
Forecasting is the process of making statements about events whose actual outcomes have not yet been observed. A commonplace example might be estimation for some variable of interest at some specified future date. Prediction is a similar, but more general term...

 is the process of estimation
Estimation
Estimation is the calculated approximation of a result which is usable even if input data may be incomplete or uncertain.In statistics,*estimation theory and estimator, for topics involving inferences about probability distributions...

 in unknown situations. Due to the element of the unknown, risk
Risk
Risk is the potential that a chosen action or activity will lead to a loss . The notion implies that a choice having an influence on the outcome exists . Potential losses themselves may also be called "risks"...

 and uncertainty
Uncertainty
Uncertainty is a term used in subtly different ways in a number of fields, including physics, philosophy, statistics, economics, finance, insurance, psychology, sociology, engineering, and information science...

 are central to forecasting and prediction. Statistical forecasting
Forecasting
Forecasting is the process of making statements about events whose actual outcomes have not yet been observed. A commonplace example might be estimation for some variable of interest at some specified future date. Prediction is a similar, but more general term...

 is the process of estimation
Estimation
Estimation is the calculated approximation of a result which is usable even if input data may be incomplete or uncertain.In statistics,*estimation theory and estimator, for topics involving inferences about probability distributions...

 in unknown situations. It can refer to estimation of time series
Time series
In statistics, signal processing, econometrics and mathematical finance, a time series is a sequence of data points, measured typically at successive times spaced at uniform time intervals. Examples of time series are the daily closing value of the Dow Jones index or the annual flow volume of the...

, cross-sectional
Cross-sectional data
Cross-sectional data or cross section in statistics and econometrics is a type of one-dimensional data set. Cross-sectional data refers to data collected by observing many subjects at the same point of time, or without regard to differences in time...

 or longitudinal
Longitudinal study
A longitudinal study is a correlational research study that involves repeated observations of the same variables over long periods of time — often many decades. It is a type of observational study. Longitudinal studies are often used in psychology to study developmental trends across the...

 data.

Prediction
Prediction
A prediction or forecast is a statement about the way things will happen in the future, often but not always based on experience or knowledge...

 is a similar, but more general term. Both can refer to estimation of time series
Time series
In statistics, signal processing, econometrics and mathematical finance, a time series is a sequence of data points, measured typically at successive times spaced at uniform time intervals. Examples of time series are the daily closing value of the Dow Jones index or the annual flow volume of the...

, cross-sectional
Cross-sectional data
Cross-sectional data or cross section in statistics and econometrics is a type of one-dimensional data set. Cross-sectional data refers to data collected by observing many subjects at the same point of time, or without regard to differences in time...

 or longitudinal
Longitudinal study
A longitudinal study is a correlational research study that involves repeated observations of the same variables over long periods of time — often many decades. It is a type of observational study. Longitudinal studies are often used in psychology to study developmental trends across the...

 data. Econometric forecasting methods use the assumption that it is possible to identify the underlying factors that might influence the variable that is being forecast. If the causes are understood, projections of the influencing variables can be made and used in the forecast. Judgmental forecasting methods incorporate intuitive judgments, opinions and probability
Probability
Probability is ordinarily used to describe an attitude of mind towards some proposition of whose truth we arenot certain. The proposition of interest is usually of the form "Will a specific event occur?" The attitude of mind is of the form "How certain are we that the event will occur?" The...

 estimates, as in the case of the Delphi method
Delphi method
The Delphi method is a structured communication technique, originally developed as a systematic, interactive forecasting method which relies on a panel of experts.In the standard version, the experts answer questionnaires in two or more rounds...

, scenario building, and simulation
Simulation
Simulation is the imitation of some real thing available, state of affairs, or process. The act of simulating something generally entails representing certain key characteristics or behaviours of a selected physical or abstract system....

s. Forecasting is applied in many areas, including weather forecasting
Weather forecasting
Weather forecasting is the application of science and technology to predict the state of the atmosphere for a given location. Human beings have attempted to predict the weather informally for millennia, and formally since the nineteenth century...

, earthquake prediction
Earthquake prediction
An earthquake prediction is a prediction that an earthquake of a specific magnitude will occur in a particular place at a particular time . Despite considerable research efforts by seismologists, scientifically reproducible predictions cannot yet be made to a specific day or month...

, transport planning, and labour market planning.

Despite the development of cognitive
Cognition
In science, cognition refers to mental processes. These processes include attention, remembering, producing and understanding language, solving problems, and making decisions. Cognition is studied in various disciplines such as psychology, philosophy, linguistics, and computer science...

 instruments for the comprehension of future, the stochastic
Stochastic process
In probability theory, a stochastic process , or sometimes random process, is the counterpart to a deterministic process...

 nature of many natural and social processes has made precise forecasting of the future elusive. Modern efforts such as future studies attempt to predict social trends, while more ancient practices, such as weather forecasting
Weather forecasting
Weather forecasting is the application of science and technology to predict the state of the atmosphere for a given location. Human beings have attempted to predict the weather informally for millennia, and formally since the nineteenth century...

, have benefited from scientific and causal model
Causal model
A causal model is an abstract model that describes the causal mechanisms of a system. The model must express more than correlation because correlation does not imply causation....

ling.

Future studies


Future studies or futurology
Futurology
Futures studies is the study of postulating possible, probable, and preferable futures and the worldviews and myths that underlie them. There is a debate as to whether this discipline is an art or science. In general, it can be considered as a branch under the more general scope of the field of...

 is the science, art and practice of postulating possible, probable, and preferable futures and the worldviews and myths that underlie them. Futures studies seeks to understand what is likely to continue, what is likely to change, and what is novel. Part of the discipline thus seeks a systematic and pattern-based understanding of past and present, and to determine the likelihood of future events and trends. A key part of this process is understanding the potential future impact of decisions made by individuals, organisations and governments. Leaders use results of such work to assist in decision-making.
Futures is an interdisciplinary field, studying yesterday's and today's changes, and aggregating and analyzing both lay and professional strategies, and opinions with respect to tomorrow. It includes analyzing the sources, patterns, and causes of change and stability in the attempt to develop foresight and to map possible futures. Modern practitioners stress the importance of alternative and plural futures, rather than one monolithic future, and the limitations of prediction and probability, versus the creation of possible and preferable futures.

Three factors usually distinguish futures studies from the research conducted by other disciplines (although all disciplines overlap, to differing degrees). First, futures studies often examines not only possible but also probable, preferable, and "wild card" futures. Second, futures studies typically attempts to gain a holistic or systemic view based on insights from a range of different disciplines. Third, futures studies challenges and unpacks the assumptions behind dominant and contending views of the future. The future thus is not empty but fraught with hidden assumptions.

Futures studies does not generally include the work of economists who forecast movements of interest rates over the next business cycle, or of managers or investors with short-term time horizons. Most strategic planning, which develops operational plans for preferred futures with time horizons of one to three years, is also not considered futures. But plans and strategies with longer time horizons that specifically attempt to anticipate and be robust to possible future events, are part of a major subdiscipline of futures studies called strategic foresight.

The futures field also excludes those who make future predictions through professed supernatural means. At the same time, it does seek to understand the models such groups use and the interpretations they give to these models.

Physics



In classical physics
Classical physics
What "classical physics" refers to depends on the context. When discussing special relativity, it refers to the Newtonian physics which preceded relativity, i.e. the branches of physics based on principles developed before the rise of relativity and quantum mechanics...

 the future is just a half of the timeline. In special relativity
Special relativity
Special relativity is the physical theory of measurement in an inertial frame of reference proposed in 1905 by Albert Einstein in the paper "On the Electrodynamics of Moving Bodies".It generalizes Galileo's...

 the future is considered as absolute future or the future light cone
Light cone
A light cone is the path that a flash of light, emanating from a single event and traveling in all directions, would take through spacetime...

. In physics, time is considered to be a fourth dimension. Physicists argue that space-time can be understood as a sort of stretchy fabric that can bend due to forces such as gravity.
While a person can move backwards or forwards in the three spatial dimensions, many physicists argue you are only able to move forward in time.

The physicist who advised the makers of the fictional time-travel film Déjà Vu claims that a person could hypothetically travel into the future if they had a spaceship that could travel at almost the speed of light. After a voyage on this ship, if a person returned to Earth, millions of years would have passed in Earth time.
Some physicists claim that by using a wormhole
Wormhole
In physics, a wormhole is a hypothetical topological feature of spacetime that would be, fundamentally, a "shortcut" through spacetime. For a simple visual explanation of a wormhole, consider spacetime visualized as a two-dimensional surface. If this surface is folded along a third dimension, it...

 to connect two regions of space-time a person could theoretically travel in time. Physicist Michio Kaku
Michio Kaku
is an American theoretical physicist, the Henry Semat Professor of Theoretical Physics in the City College of New York of City University of New York, the co-founder of string field theory, and a "communicator" and "popularizer" of science...

 points out that to power this hypothetical time machine and "punch a hole into the fabric of space-time", it would require the energy of a star. Another theory is that a person could travel in time with cosmic string
Cosmic string
Cosmic strings are hypothetical 1-dimensional topological defects which may have formed during a symmetry breaking phase transition in the early universe when the topology of the vacuum manifold associated to this symmetry breaking is not simply connected. It is expected that at least one string...

s.

Similarly for mathematics, at least in a sort of comical theory, trying to comprehend and predict the future might be possible if one were to derive the most complex mathematical equation that could ever exist pertaining to the exact flow and location of every bit of matter and energy within the universe. Put simply, a progressive equation of every aspect of everything known to exist. However, if it were possible to do so it would likely take an infinite amount of time to perform the tedious calculation and therefore prove to be futile.

Philosophy


In the philosophy of time, presentism is the belief
Belief
Belief is the psychological state in which an individual holds a proposition or premise to be true.-Belief, knowledge and epistemology:The terms belief and knowledge are used differently in philosophy....

 that only the present exists
Existence
In common usage, existence is the world we are aware of through our senses, and that persists independently without them. In academic philosophy the word has a more specialized meaning, being contrasted with essence, which specifies different forms of existence as well as different identity...

 and the future and the past
Past
Most generally, the past is a term used to indicate the totality of events which occurred before a given point in time. The past is contrasted with and defined by the present and the future. The concept of the past is derived from the linear fashion in which human observers experience time, and is...

 are unreal
Reality
In philosophy, reality is the state of things as they actually exist, rather than as they may appear or might be imagined. In a wider definition, reality includes everything that is and has been, whether or not it is observable or comprehensible...

. Past and future "entities" are to be construed as logic
Logic
In philosophy, Logic is the formal systematic study of the principles of valid inference and correct reasoning. Logic is used in most intellectual activities, but is studied primarily in the disciplines of philosophy, mathematics, semantics, and computer science...

al constructions or fictions
Fictionalism
Fictionalism is a methodological theory in philosophy that suggests that statements of a certain sort should not be taken to be literally true, but merely as a useful fiction...

. The opposite of presentism is 'eternalism', which is the belief that things in the past and things yet to come exist eternally
Eternity
While in the popular mind, eternity often simply means existence for a limitless amount of time, many have used it to refer to a timeless existence altogether outside time. By contrast, infinite temporal existence is then called sempiternity. Something eternal exists outside time; by contrast,...

. One other view (that has not been held by very many philosophers) is sometimes called the 'growing block
Growing block universe
According to the Growing Block Universe or The Growing Block View theory of time, the past and present exist and the future does not exist. The present is an objective property, to be compared with a moving spotlight. By the passage of time more of the world comes into being, therefore the block...

' theory
Theory
The English word theory was derived from a technical term in Ancient Greek philosophy. The word theoria, , meant "a looking at, viewing, beholding", and referring to contemplation or speculation, as opposed to action...

 of time, which is a theory that takes the past and present to exist but the future to be nonexistent.

Presentism is compatible
Compatibility
Compatibility may refer to:* Astrological compatibility* Compatibilism – a philosophical position* Compatibility * Compatibility * Compatibility * Electromagnetic compatibility* Interpersonal compatibility-Computing:...

 with Galilean relativity, in which time is independent of space but is probably incompatible with Lorentz
Lorentz
Lorentz is a name derived from the Roman surname, Laurentius, which mean "from Laurentum". It is the German form of Laurence.Lorentz may refer to:- Literature :* Friedrich Lorentz, author of works on the Pomeranian language...

ian/Einsteinian relativity in conjunction with certain other philosophical theses
Thesis
A dissertation or thesis is a document submitted in support of candidature for an academic degree or professional qualification presenting the author's research and findings...

 which many find uncontroversial. Saint Augustine
Augustine of Hippo
Augustine of Hippo , also known as Augustine, St. Augustine, St. Austin, St. Augoustinos, Blessed Augustine, or St. Augustine the Blessed, was Bishop of Hippo Regius . He was a Latin-speaking philosopher and theologian who lived in the Roman Africa Province...

 proposed
Research proposal
A research proposal is a document written by a researcher that describes in details the program for a proposed. It is like an outline of the entire research process that gives a reader a summary of the information discussed in a project....

 that the present is a knife edge between the past and the future and could not contain any extended period of time.

Contrary to Saint Augustine, some philosophers propose that conscious experience is extended in time. For instance, William James
William James
William James was a pioneering American psychologist and philosopher who was trained as a physician. He wrote influential books on the young science of psychology, educational psychology, psychology of religious experience and mysticism, and on the philosophy of pragmatism...

 said that time is "the short duration of which we are immediately and incessantly sensible". Augustine proposed that God is outside of time and present for all times, in eternity
Eternity
While in the popular mind, eternity often simply means existence for a limitless amount of time, many have used it to refer to a timeless existence altogether outside time. By contrast, infinite temporal existence is then called sempiternity. Something eternal exists outside time; by contrast,...

. Other early philosophers who were presentists include the Buddhists
Buddhism
Buddhism is a religion and philosophy encompassing a variety of traditions, beliefs and practices, largely based on teachings attributed to Siddhartha Gautama, commonly known as the Buddha . The Buddha lived and taught in the northeastern Indian subcontinent some time between the 6th and 4th...

 (in the tradition of Indian Buddhism). A leading scholar from the modern era on Buddhist philosophy
Buddhist philosophy
Buddhist philosophy deals extensively with problems in metaphysics, phenomenology, ethics, and epistemology.Some scholars assert that early Buddhist philosophy did not engage in ontological or metaphysical speculation, but was based instead on empirical evidence gained by the sense organs...

 is Stcherbatsky, who has written extensively on Buddhist presentism:

Psychology



While ethologists
Ethology
Ethology is the scientific study of animal behavior, and a sub-topic of zoology....

 consider animal behavior to be largely based on fixed action pattern
Fixed action pattern
In ethology, a fixed action pattern , or modal action pattern, is an instinctive behavioral sequence that is indivisible and runs to completion...

s or other learned traits in an animal's past, human behavior
Human behavior
Human behavior refers to the range of behaviors exhibited by humans and which are influenced by culture, attitudes, emotions, values, ethics, authority, rapport, hypnosis, persuasion, coercion and/or genetics....

 is known to encompass an anticipation of the future. Anticipatory behavior can be the result of a psychological outlook toward the future, for examples optimism
Optimism
The Oxford English Dictionary defines optimism as having "hopefulness and confidence about the future or successful outcome of something; a tendency to take a favourable or hopeful view." The word is originally derived from the Latin optimum, meaning "best." Being optimistic, in the typical sense...

, pessimism
Pessimism
Pessimism, from the Latin word pessimus , is a state of mind in which one perceives life negatively. Value judgments may vary dramatically between individuals, even when judgments of fact are undisputed. The most common example of this phenomenon is the "Is the glass half empty or half full?"...

, and hope
Hope
Hope is the emotional state which promotes the belief in a positive outcome related to events and circumstances in one's life. It is the "feeling that what is wanted can be had or that events will turn out for the best" or the act of "look[ing] forward to with desire and reasonable confidence" or...

.

Optimism is an outlook on life such that one maintains a view of the world as a positive place. People would say that optimism is seeing the glass "half full" of water as opposed to half empty. It is the philosophical opposite of pessimism. Optimists generally believe that people and events are inherently good, so that most situations work out in the end for the best.Hope is a belief in a positive outcome related to events and circumstances in one's life. Hope implies a certain amount of despair, wanting, wishing, suffering or perseverance — i.e., believing that a better or positive outcome is possible even when there is some evidence to the contrary. "Hopefulness" is somewhat different from optimism in that hope is an emotional state, whereas optimism is a conclusion reached through a deliberate thought pattern that leads to a positive attitude.

Religion



Religions consider the future when they address issues such as karma
Karma
Karma in Indian religions is the concept of "action" or "deed", understood as that which causes the entire cycle of cause and effect originating in ancient India and treated in Hindu, Jain, Buddhist and Sikh philosophies....

, life after death
Afterlife
The afterlife is the belief that a part of, or essence of, or soul of an individual, which carries with it and confers personal identity, survives the death of the body of this world and this lifetime, by natural or supernatural means, in contrast to the belief in eternal...

, and eschatologies
Eschatology
Eschatology is a part of theology, philosophy, and futurology concerned with what are believed to be the final events in history, or the ultimate destiny of humanity, commonly referred to as the end of the world or the World to Come...

 that study what the end of time and the end of the world will be. In religion, major prophets are said to have the power to change the future. Common religious figures have claimed to see into the future, such as minor prophet
Prophet
In religion, a prophet, from the Greek word προφήτης profitis meaning "foreteller", is an individual who is claimed to have been contacted by the supernatural or the divine, and serves as an intermediary with humanity, delivering this newfound knowledge from the supernatural entity to other people...

s and diviners
Divination
Divination is the attempt to gain insight into a question or situation by way of an occultic standardized process or ritual...

.
The term "afterlife" refers to the continuation of existence
Existence
In common usage, existence is the world we are aware of through our senses, and that persists independently without them. In academic philosophy the word has a more specialized meaning, being contrasted with essence, which specifies different forms of existence as well as different identity...

 of the soul, spirit
Spirit
The English word spirit has many differing meanings and connotations, most of them relating to a non-corporeal substance contrasted with the material body.The spirit of a living thing usually refers to or explains its consciousness.The notions of a person's "spirit" and "soul" often also overlap,...

 or mind
Mind
The concept of mind is understood in many different ways by many different traditions, ranging from panpsychism and animism to traditional and organized religious views, as well as secular and materialist philosophies. Most agree that minds are constituted by conscious experience and intelligent...

 of a human (or animal) after physical death
Death
Death is the permanent termination of the biological functions that sustain a living organism. Phenomena which commonly bring about death include old age, predation, malnutrition, disease, and accidents or trauma resulting in terminal injury....

, typically in a spiritual
Spirituality
Spirituality can refer to an ultimate or an alleged immaterial reality; an inner path enabling a person to discover the essence of his/her being; or the “deepest values and meanings by which people live.” Spiritual practices, including meditation, prayer and contemplation, are intended to develop...

 or ghost
Ghost
In traditional belief and fiction, a ghost is the soul or spirit of a deceased person or animal that can appear, in visible form or other manifestation, to the living. Descriptions of the apparition of ghosts vary widely from an invisible presence to translucent or barely visible wispy shapes, to...

like afterworld. Deceased persons are usually believed to go to a specific region or plane of existence in this afterworld, often depending on the rightness of their actions during life.

Some believe the afterlife includes some form of preparation for the soul to be transferred to another body (reincarnation
Reincarnation
Reincarnation best describes the concept where the soul or spirit, after the death of the body, is believed to return to live in a new human body, or, in some traditions, either as a human being, animal or plant...

).
The major views on the afterlife derive from religion
Religion
Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...

, esotericism
Esotericism
Esotericism or Esoterism signifies the holding of esoteric opinions or beliefs, that is, ideas preserved or understood by a small group or those specially initiated, or of rare or unusual interest. The term derives from the Greek , a compound of : "within", thus "pertaining to the more inward",...

 and metaphysics
Metaphysics
Metaphysics is a branch of philosophy concerned with explaining the fundamental nature of being and the world, although the term is not easily defined. Traditionally, metaphysics attempts to answer two basic questions in the broadest possible terms:...

. There are those who are skeptical of the existence of the afterlife, or believe that it is absolutely impossible, such as the materialist
Materialism
In philosophy, the theory of materialism holds that the only thing that exists is matter; that all things are composed of material and all phenomena are the result of material interactions. In other words, matter is the only substance...

-reductionists, who believe that the topic is supernatural
Supernatural
The supernatural or is that which is not subject to the laws of nature, or more figuratively, that which is said to exist above and beyond nature...

, therefore does not really exist or is unknowable. In metaphysical models, theists generally believe some sort of afterlife awaits people when they die. Atheists
Atheism
Atheism is, in a broad sense, the rejection of belief in the existence of deities. In a narrower sense, atheism is specifically the position that there are no deities...

 generally believe that there is not a life after death. Members of some generally non-theistic religions such as Buddhism
Buddhism
Buddhism is a religion and philosophy encompassing a variety of traditions, beliefs and practices, largely based on teachings attributed to Siddhartha Gautama, commonly known as the Buddha . The Buddha lived and taught in the northeastern Indian subcontinent some time between the 6th and 4th...

, tend to believe in an afterlife like reincarnation
Reincarnation
Reincarnation best describes the concept where the soul or spirit, after the death of the body, is believed to return to live in a new human body, or, in some traditions, either as a human being, animal or plant...

 but without reference to God
God
God is the English name given to a singular being in theistic and deistic religions who is either the sole deity in monotheism, or a single deity in polytheism....

.

Agnostics
Agnosticism
Agnosticism is the view that the truth value of certain claims—especially claims about the existence or non-existence of any deity, but also other religious and metaphysical claims—is unknown or unknowable....

 generally hold the position that like the existence of God, the existence of supernatural phenomena, such as souls or life after death, is unverifiable and therefore unknowable. Many religions, whether they believe in the soul’s existence in another world like Christianity, Islam and many pagan
Paganism
Paganism is a blanket term, typically used to refer to non-Abrahamic, indigenous polytheistic religious traditions....

 belief systems, or in reincarnation like many forms of Hinduism and Buddhism, believe that one’s status in the afterlife is a reward or punishment for their conduct during life, with the exception of Christianity, which believes one's status in the afterlife is a gift from God and cannot be earned during life. “For by grace are you saved through faith; and that not of yourselves: it is the gift of God; not of works, lest any man should boast.” (Ephesians 2: 8,9)

Eschatology
Eschatology
Eschatology is a part of theology, philosophy, and futurology concerned with what are believed to be the final events in history, or the ultimate destiny of humanity, commonly referred to as the end of the world or the World to Come...

 is a part of theology
Theology
Theology is the systematic and rational study of religion and its influences and of the nature of religious truths, or the learned profession acquired by completing specialized training in religious studies, usually at a university or school of divinity or seminary.-Definition:Augustine of Hippo...

 and philosophy
Philosophy
Philosophy is the study of general and fundamental problems, such as those connected with existence, knowledge, values, reason, mind, and language. Philosophy is distinguished from other ways of addressing such problems by its critical, generally systematic approach and its reliance on rational...

 concerned with the final events in the history of the world
History of the world
The history of the world or human history is the history of humanity from the earliest times to the present, in all places on Earth, beginning with the Paleolithic Era. It excludes non-human natural history and geological history, except insofar as the natural world substantially affects human lives...

, or the ultimate destiny
Destiny
Destiny or fate refers to a predetermined course of events. It may be conceived as a predetermined future, whether in general or of an individual...

 of humanity, commonly referred to as the end of the world. While in mysticism
Mysticism
Mysticism is the knowledge of, and especially the personal experience of, states of consciousness, i.e. levels of being, beyond normal human perception, including experience and even communion with a supreme being.-Classical origins:...

 the phrase refers metaphorically to the end of ordinary reality and reunion with the Divine, in many traditional religion
Religion
Religion is a collection of cultural systems, belief systems, and worldviews that establishes symbols that relate humanity to spirituality and, sometimes, to moral values. Many religions have narratives, symbols, traditions and sacred histories that are intended to give meaning to life or to...

s it is taught as an actual future event prophesied
Prophecy
Prophecy is a process in which one or more messages that have been communicated to a prophet are then communicated to others. Such messages typically involve divine inspiration, interpretation, or revelation of conditioned events to come as well as testimonies or repeated revelations that the...

 in sacred texts or folklore
Folklore
Folklore consists of legends, music, oral history, proverbs, jokes, popular beliefs, fairy tales and customs that are the traditions of a culture, subculture, or group. It is also the set of practices through which those expressive genres are shared. The study of folklore is sometimes called...

. More broadly, eschatology may encompass related concepts such as the Messiah
Messiah
A messiah is a redeemer figure expected or foretold in one form or another by a religion. Slightly more widely, a messiah is any redeemer figure. Messianic beliefs or theories generally relate to eschatological improvement of the state of humanity or the world, in other words the World to...

 or Messianic Age
Messianic Age
Messianic Age is a theological term referring to a future time of universal peace and brotherhood on the earth, without crime, war and poverty. Many religions believe that there will be such an age; some refer to it as the "Kingdom of God" or the "World to Come".- Terminology: "messianic" and...

, the end time, and the end of days
End of days
End of days may refer to:* End of Days , a religious concept* End of Days , a 1999 horror film* "End of Days" , a 2003 television episode* "End of Days" , a 2007 television episode...

.

Futurism


Futurism
Futurism
Futurism was an artistic and social movement that originated in Italy in the early 20th century.Futurism or futurist may refer to:* Afrofuturism, an African-American and African diaspora subculture* Cubo-Futurism* Ego-Futurism...

 was an art
Art
Art is the product or process of deliberately arranging items in a way that influences and affects one or more of the senses, emotions, and intellect....

 movement
Art movement
An art movement is a tendency or style in art with a specific common philosophy or goal, followed by a group of artists during a restricted period of time, or, at least, with the heyday of the movement defined within a number of years...

 that originated in Italy
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 at the beginning of the 20th century. Futurism was a largely Italian
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 and Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n movement, although it also had adherents in other countries, England and Portugal for example. The Futurists explored every medium of art, including painting
Painting
Painting is the practice of applying paint, pigment, color or other medium to a surface . The application of the medium is commonly applied to the base with a brush but other objects can be used. In art, the term painting describes both the act and the result of the action. However, painting is...

, sculpture
Sculpture
Sculpture is three-dimensional artwork created by shaping or combining hard materials—typically stone such as marble—or metal, glass, or wood. Softer materials can also be used, such as clay, textiles, plastics, polymers and softer metals...

, poetry
Poetry
Poetry is a form of literary art in which language is used for its aesthetic and evocative qualities in addition to, or in lieu of, its apparent meaning...

, theatre
Theatre
Theatre is a collaborative form of fine art that uses live performers to present the experience of a real or imagined event before a live audience in a specific place. The performers may communicate this experience to the audience through combinations of gesture, speech, song, music or dance...

, music
Music
Music is an art form whose medium is sound and silence. Its common elements are pitch , rhythm , dynamics, and the sonic qualities of timbre and texture...

, architecture
Architecture
Architecture is both the process and product of planning, designing and construction. Architectural works, in the material form of buildings, are often perceived as cultural and political symbols and as works of art...

 and even gastronomy
Gastronomy
Gastronomy is the art or science of food eating. Also, it can be defined as the study of food and culture, with a particular focus on gourmet cuisine...

. Futurists had a passionate loathing of ideas from the past, especially political and artistic traditions. They also espoused a love of speed
Speed
In kinematics, the speed of an object is the magnitude of its velocity ; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as...

, technology
Technology
Technology is the making, usage, and knowledge of tools, machines, techniques, crafts, systems or methods of organization in order to solve a problem or perform a specific function. It can also refer to the collection of such tools, machinery, and procedures. The word technology comes ;...

, and violence
Violence
Violence is the use of physical force to apply a state to others contrary to their wishes. violence, while often a stand-alone issue, is often the culmination of other kinds of conflict, e.g...

. Futurists dubbed the love of the past passéisme. The car, the plane, the industrial town were all legendary for the Futurists, because they represented the technological triumph of people over nature
Nature
Nature, in the broadest sense, is equivalent to the natural world, physical world, or material world. "Nature" refers to the phenomena of the physical world, and also to life in general...

. The Futurist Manifesto had declared, "We will glorify war - the world's only hygiene - militarism, patriotism, the destructive gesture of freedom-bringers, beautiful ideas worth dying for, and scorn for woman." Although it owed much of its character and some of its ideas to radical political movements, it was not much involved in politics until the autumn of 1913.

One of the many 20th century classical movements in music was one which involved homage to, inclusion of, or imitation of machines. Closely identified with the central Italian Futurist movement were brother composers Luigi Russolo
Luigi Russolo
Luigi Russolo was an Italian Futurist painter and composer, and the author of the manifesto The Art of Noises . He is often regarded as one of the first noise music experimental composers with his performances of "noise concerts" in 1913-14 and then again after World War I, notably in Paris in 1921...

 and Antonio Russolo
Antonio Russolo
Antonio Russolo was an Italian Futurist composer, brother of the more famous Futurist composer and theorist Luigi Russolo. The 78 rpm record made by him in 1921 is the only surviving sound recording that features the original intonarumori...

, who used instruments known as "intonarumori", which were essentially sound boxes used to create music out of noise. Luigi Russolo's futurist manifesto, The Art of Noises
The Art of Noises
The Art of Noises is a Futurist manifesto, written by Luigi Russolo in a 1913 letter to friend and Futurist composer Francesco Balilla Pratella...

, is considered to be one of the most important and influential texts in 20th century musical aesthetics. Other examples of futurist music include Arthur Honegger
Arthur Honegger
Arthur Honegger was a Swiss composer, who was born in France and lived a large part of his life in Paris. He was a member of Les six. His most frequently performed work is probably the orchestral work Pacific 231, which is interpreted as imitating the sound of a steam locomotive.-Biography:Born...

's Pacific 231
Pacific 231
Pacific 231 is an orchestral work by Arthur Honegger, written in 1923. It is one of his most frequently performed works today.The popular interpretation of the piece is that it depicts a steam locomotive, an interpretation that is supported by the title of the piece. Honegger, however, insisted...

, which imitates the sound of a steam locomotive, Prokofiev's "The Steel Step", and the experiments of Edgard Varèse.

Literary futurism
Futurism (literature)
Futurism was a modernist avant-garde movement in literature that made its official debut with the publication of Filippo Tommaso Marinetti's Manifesto of Futurism . Futurist poetry may be characterised by its unexpected combinations of images and its hyper-conciseness...

 made its debut with F.T. Marinetti's Manifesto of Futurism
Futurist Manifesto
The Futurist Manifesto, written by the Italian poet Filippo Tommaso Marinetti, was published in the Italian newspaper Gazzetta dell'Emilia in Bologna on 5 February 1909, then in French as "Manifeste du futurisme" in the newspaper Le Figaro on 20 February 1909...

(1909). Futurist poetry used unexpected combinations of images and hyper-conciseness (not to be confused with the actual length of the poem). Futurist theater works have scenes that are few sentences long, and which use nonsensical humor and which attempt to discredit the deep-rooted dramatic traditions with parody. The longer forms of literature, such as the novel, had no place in the Futurist aesthetic, which was obsessed with speed and compression.

Futurism expanded to encompass other artistic domains and ultimately included painting, sculpture, ceramics, graphic design, industrial design, interior design, theatre design, textiles, drama, literature, music and architecture. In architecture, it was characterized by a distinctive thrust towards rationalism
Rationalism
In epistemology and in its modern sense, rationalism is "any view appealing to reason as a source of knowledge or justification" . In more technical terms, it is a method or a theory "in which the criterion of the truth is not sensory but intellectual and deductive"...

 and modernism
Modernism
Modernism, in its broadest definition, is modern thought, character, or practice. More specifically, the term describes the modernist movement, its set of cultural tendencies and array of associated cultural movements, originally arising from wide-scale and far-reaching changes to Western society...

 through the use of advanced building materials. The ideals of futurism remain as significant components of modern Western culture
Western culture
Western culture, sometimes equated with Western civilization or European civilization, refers to cultures of European origin and is used very broadly to refer to a heritage of social norms, ethical values, traditional customs, religious beliefs, political systems, and specific artifacts and...

; the emphasis on youth, speed, power and technology finding expression in much of modern commercial cinema and culture. Futurism has produced several reactions, including the 1980s-era literary genre of cyberpunk
Cyberpunk
Cyberpunk is a postmodern and science fiction genre noted for its focus on "high tech and low life." The name is a portmanteau of cybernetics and punk, and was originally coined by Bruce Bethke as the title of his short story "Cyberpunk," published in 1983...

 — in which technology was often treated with a critical eye.

Science fiction


Science fiction writer Robert A. Heinlein
Robert A. Heinlein
Robert Anson Heinlein was an American science fiction writer. Often called the "dean of science fiction writers", he was one of the most influential and controversial authors of the genre. He set a standard for science and engineering plausibility and helped to raise the genre's standards of...

 defines science fiction as:
More generally, science fiction
Science fiction
Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 is a broad genre of fiction
Fiction
Fiction is the form of any narrative or informative work that deals, in part or in whole, with information or events that are not factual, but rather, imaginary—that is, invented by the author. Although fiction describes a major branch of literary work, it may also refer to theatrical,...

 that often involves speculations based on current or future science
Science
Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe...

 or technology
Technology
Technology is the making, usage, and knowledge of tools, machines, techniques, crafts, systems or methods of organization in order to solve a problem or perform a specific function. It can also refer to the collection of such tools, machinery, and procedures. The word technology comes ;...

. Science fiction is found in books, art, television, films, games, theater, and other media. Science fiction differs from fantasy in that, within the context of the story, its imaginary elements are largely possible within scientifically established or scientifically postulated laws of nature (though some elements in a story might still be pure imaginative speculation). Settings may include the future, or alternative time lines, and stories may depict new or speculative scientific principles, such as time travel
Time travel
Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the...

 or psionics
Psionics
Psionics refers to the practice, study, or psychic ability of using the mind to induce paranormal phenomena. Examples of this include telepathy, telekinesis, and other workings of the outside world through the psyche.-History and terminology:...

, or new technology, such as nanotechnology
Nanotechnology
Nanotechnology is the study of manipulating matter on an atomic and molecular scale. Generally, nanotechnology deals with developing materials, devices, or other structures possessing at least one dimension sized from 1 to 100 nanometres...

, faster-than-light
Faster-than-light
Faster-than-light communications and travel refer to the propagation of information or matter faster than the speed of light....

 travel or robot
Robot
A robot is a mechanical or virtual intelligent agent that can perform tasks automatically or with guidance, typically by remote control. In practice a robot is usually an electro-mechanical machine that is guided by computer and electronic programming. Robots can be autonomous, semi-autonomous or...

s. Exploring the consequences of such differences is the traditional purpose of science fiction, making it a "literature of ideas".

Some science fiction
Science fiction
Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 authors construct a postulated history
History
History is the discovery, collection, organization, and presentation of information about past events. History can also mean the period of time after writing was invented. Scholars who write about history are called historians...

 of the future called a "future history
Future history
A future history is a postulated history of the future and is used by authors in the subgenre of speculative fiction to construct a common background for fiction...

" which serves as a common background for their fiction. Sometimes the author publishes a timeline
Chronology
Chronology is the science of arranging events in their order of occurrence in time, such as the use of a timeline or sequence of events. It is also "the determination of the actual temporal sequence of past events".Chronology is part of periodization...

 of events in their history, while other times the reader can reconstruct the order of the stories from information provided therein. Some works were published which constituted "future history" in a more literal sense - i.e., stories or whole books purporting to be excerpts of a history book from the future and which are written in the form of a history book - i.e., having no personal protagonists but rather describing the development of nations and societies over decades and centuries. Examples include H.G. Wells' The Shape of Things to Come
The Shape of Things to Come
The Shape of Things to Come is a work of science fiction by H. G. Wells, published in 1933, which speculates on future events from 1933 until the year 2106. The book is dominated by Wells's belief in a world state as the solution to mankind's problems....

(1933), which was written in the form of a history book published in the year 2106 and - in the manner of a real history book - containing numerous footnotes and references to the works of (mostly fictitious) prominent historians of the 20th and 21st centuries.

See also

  • Alternative future
  • Cheiromancy
  • Futurism
    Futurism
    Futurism was an artistic and social movement that originated in Italy in the early 20th century.Futurism or futurist may refer to:* Afrofuturism, an African-American and African diaspora subculture* Cubo-Futurism* Ego-Futurism...

  • Futurology
    Futurology
    Futures studies is the study of postulating possible, probable, and preferable futures and the worldviews and myths that underlie them. There is a debate as to whether this discipline is an art or science. In general, it can be considered as a branch under the more general scope of the field of...

  • Futurewise
    Futurewise
    Futurewise is a book on global trends written by the futurist Patrick Dixon in 1998, with new editions in 2001, 2003 and 2007. Dr Patrick Dixon has been ranked as one of the 20 most influential business thinkers alive today by Thinkers 50, and is author of 11 other books including Building a...

  • Paleofuture

Future events

  • Timeline of the near future
    Timeline of the near future
    This is a timeline of the near future, covering predicted or calculated events from next year until the end of the 23rd century.-2010s:* 2012: Alan Turing Year. Winter Youth Olympics held in Innsbruck and Summer Olympics held in London. Last transit of Venus until 2117...

  • Timeline of the future in forecasts
    Timeline of the future in forecasts
    This timeline of the future in forecasts is a list of credible forecasts of near-future events and developments in all areas of science, technology, society and the environment....

  • Timeline of the far future
    Timeline of the far future
    While predictions of the future can never be absolutely certain, this list of predictions follows from present scientific understanding and models...

  • Future of the Earth
    Future of the Earth
    The biological and geological future of the Earth can be extrapolated based upon the estimated effects of several long-term influences. These include the chemistry at the Earth's surface, the rate of cooling of the planet's interior, the gravitational interactions with other objects in the Solar...

  • Future of the Solar System
  • Future of an expanding universe
    Future of an expanding universe
    Observations suggest that the expansion of the universe will continue forever. If so, the universe will cool as it expands, eventually becoming too cold to sustain life. For this reason, this future scenario is popularly called the Big Freeze....