Imperial Earth
Encyclopedia
Imperial Earth is a novel
Novel
A novel is a book of long narrative in literary prose. The genre has historical roots both in the fields of the medieval and early modern romance and in the tradition of the novella. The latter supplied the present generic term in the late 18th century....

  written by Arthur C. Clarke
Arthur C. Clarke
Sir Arthur Charles Clarke, CBE, FRAS was a British science fiction author, inventor, and futurist, famous for his short stories and novels, among them 2001: A Space Odyssey, and as a host and commentator in the British television series Mysterious World. For many years, Robert A. Heinlein,...

, and published in time for the U.S. bicentennial
United States Bicentennial
The United States Bicentennial was a series of celebrations and observances during the mid-1970s that paid tribute to the historical events leading up to the creation of the United States as an independent republic...

 in 1976 by Ballantine Books
Ballantine Books
Ballantine Books is a major book publisher located in the United States, founded in 1952 by Ian Ballantine with his wife, Betty Ballantine. It was acquired by Random House in 1973, which in turn was acquired by Bertelsmann AG in 1998 and remains part of that company today. Ballantine's logo is a...

. The plot follows the protagonist, Duncan Makenzie, on a trip to Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

 from his home on Titan
Titan (moon)
Titan , or Saturn VI, is the largest moon of Saturn, the only natural satellite known to have a dense atmosphere, and the only object other than Earth for which clear evidence of stable bodies of surface liquid has been found....

, ostensibly for a diplomatic visit to the U.S. for its 500th birthday, but really in order to have a clone of himself produced.

Plot summary

Duncan Makenzie is the latest generation of the 'first family' of Titan, a colonised moon of Saturn. Originally settled by his grandfather Malcolm Makenzie in the early 23rd century, Titan's economy has flourished based on the harvest and sale of hydrogen
Hydrogen
Hydrogen is the chemical element with atomic number 1. It is represented by the symbol H. With an average atomic weight of , hydrogen is the lightest and most abundant chemical element, constituting roughly 75% of the Universe's chemical elemental mass. Stars in the main sequence are mainly...

 mined from the atmosphere, which is used to fuel the fusion engines of interplanetary spacecraft.

As the plot opens in 2276, a number of factors are combining to make a diplomatic visit to the 'mother world' of Earth a necessity. Firstly, the forthcoming 500th anniversary of US Independence which is bringing in colonists from the entire Solar System
Solar System
The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. The vast majority of the system's mass is in the Sun...

, obviously needs a suitable representative from Titan. Secondly, the Makenzie family carry a fatal damaged gene that means any normal continuation of the family line is impossible — so both Duncan and his "father" Colin are clones of his "grandfather" Malcolm. Human cloning
Cloning
Cloning in biology is the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such as bacteria, insects or plants reproduce asexually. Cloning in biotechnology refers to processes used to create copies of DNA fragments , cells , or...

 is a mature technology
Mature technology
A mature technology is a technology that has been in use for long enough that most of its initial faults and inherent problems have been removed or reduced by further development...

, but is even at this time ethically controversial. And thirdly, technological advances in spacecraft drive systems — specifically the 'asymptotic drive' which improves the fuel efficiency by orders of magnitude — means that Titan's whole economy is under threat as the demand for hydrogen is about to collapse.

The human aspects of the tale center mainly on the intense infatuation (largely unrequited but not unconsummated) that the two main male characters, Duncan and Karl Helmer, develop for the vividly characterized Catherine Linden Ellerman (Calindy), a visitor to Titan from Earth in their youth, and its lifelong consequences.

A number of other sub-plots suggest some sort of greater mystery, but remain unexplored. The book ends with him returning home with his new "child" Malcolm (who is a clone of his dead friend Karl), leaving the other plot threads dangling.

Major themes

The puzzle game Pentomino
Pentomino
A pentomino is a polyomino composed of five congruent squares, connected along their edges ....

s features in a prominent subplot of the novel.

The book offers socially liberal ideas about sexuality and racial attitudes. For example, Duncan Makenzie is black. This is not mentioned until approximately halfway through the book; his race is no more significant to him than his hair color. At several points Makenzie also reminisces about sexual affairs with males, and that bisexuality
Bisexuality
Bisexuality is sexual behavior or an orientation involving physical or romantic attraction to both males and females, especially with regard to men and women. It is one of the three main classifications of sexual orientation, along with a heterosexual and a homosexual orientation, all a part of the...

 is now considered the norm. Exclusive heterosexuality
Heterosexuality
Heterosexuality is romantic or sexual attraction or behavior between members of the opposite sex or gender. As a sexual orientation, heterosexuality refers to "an enduring pattern of or disposition to experience sexual, affectional, physical or romantic attractions to persons of the opposite sex";...

 or homosexuality
Homosexuality
Homosexuality is romantic or sexual attraction or behavior between members of the same sex or gender. As a sexual orientation, homosexuality refers to "an enduring pattern of or disposition to experience sexual, affectional, or romantic attractions" primarily or exclusively to people of the same...

 is not generally practiced.

Clarke describes in great detail throughout the book a personal communications device called a 'minisec' combining mobile video phone and PDA with global data connectivity. He also describes a larger desk 'comsole' or communications console giving similar access to global information services.

However, the major theme of the novel is the nature of change and transition. For Titan it stands on a precipice of transition; it can either fall into the past with the demise of hydrogen and become "decadent" like earth or become the beginning of a new and uncertain frontier. Karl is obsessed with preserving the past in his relationships and Duncan himself is the preservation of his grandfather, which Duncan ultimately ends with the cloning of Karl.

Editions

The original UK hardcover edition (ISBN 0-575-02011-3) has the subtitle "A Fantasy of Love and Discord" and has 38 chapters and "Acknowledgments and Notes". The later US hardcover edition adds a quote from Ernest Hemingway
Ernest Hemingway
Ernest Miller Hemingway was an American author and journalist. His economic and understated style had a strong influence on 20th-century fiction, while his life of adventure and his public image influenced later generations. Hemingway produced most of his work between the mid-1920s and the...

, has 43 chapters, drops the subtitle, and expands the Acknowledgements and Notes. The later US paperback edition also features an "Additional Note" about a possible biological error in the plot.
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