Emergency Committee of Atomic Scientists
Encyclopedia
The Emergency Committee of Atomic Scientists (ECAS) was founded by Albert Einstein
Albert Einstein
Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...

 and Leó Szilárd
Leó Szilárd
Leó Szilárd was an Austro-Hungarian physicist and inventor who conceived the nuclear chain reaction in 1933, patented the idea of a nuclear reactor with Enrico Fermi, and in late 1939 wrote the letter for Albert Einstein's signature that resulted in the Manhattan Project that built the atomic bomb...

 in 1946. Its aims were to warn the public of the dangers associated with the development of nuclear weapon
Nuclear weapon
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission or a combination of fission and fusion. Both reactions release vast quantities of energy from relatively small amounts of matter. The first fission bomb test released the same amount...

s, promote the peaceful use of nuclear energy
Nuclear power
Nuclear power is the use of sustained nuclear fission to generate heat and electricity. Nuclear power plants provide about 6% of the world's energy and 13–14% of the world's electricity, with the U.S., France, and Japan together accounting for about 50% of nuclear generated electricity...

, and ultimately work towards world peace
World peace
World Peace is an ideal of freedom, peace, and happiness among and within all nations and/or people. World peace is an idea of planetary non-violence by which nations willingly cooperate, either voluntarily or by virtue of a system of governance that prevents warfare. The term is sometimes used to...

, which was seen as the only way that nuclear weapons would not be used again.

The Committee was established in the wake of the "Szilárd petition
Szilárd petition
The Szilárd petition, drafted by scientist Leó Szilárd, was signed by 155 scientists working on the Manhattan Project in Oak Ridge, Tennessee, and the Metallurgical Laboratory in Chicago, Illinois. It was circulated in July 1945 and asked President Harry S. Truman to consider an observed...

" (1945) to United States president
President of the United States
The President of the United States of America is the head of state and head of government of the United States. The president leads the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces....

 Harry S. Truman
Harry S. Truman
Harry S. Truman was the 33rd President of the United States . As President Franklin D. Roosevelt's third vice president and the 34th Vice President of the United States , he succeeded to the presidency on April 12, 1945, when President Roosevelt died less than three months after beginning his...

 opposing the use of the atomic bomb on moral grounds, which was signed by 68 scientists who had worked on the Manhattan Project
Manhattan Project
The Manhattan Project was a research and development program, led by the United States with participation from the United Kingdom and Canada, that produced the first atomic bomb during World War II. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the US Army...

. A majority of scientists working on the Manhattan Project did not know entirely what they were creating at the time.

The Committee only ever consisted of the eight members of the Board of Trustees, who were:
  • Albert Einstein
    Albert Einstein
    Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history...

     Chairman
  • Harold C. Urey Vice-Chairman
  • Hans Bethe
    Hans Bethe
    Hans Albrecht Bethe was a German-American nuclear physicist, and Nobel laureate in physics for his work on the theory of stellar nucleosynthesis. A versatile theoretical physicist, Bethe also made important contributions to quantum electrodynamics, nuclear physics, solid-state physics and...

  • T.R. Hogness
  • Philip M. Morse
    Philip M. Morse
    Philip McCord Morse , was an American physicist, administrator and pioneer of operations research in World War II. He is considered to be the father of operations research in the U.S.- Biography :Morse graduated from the Case School of Applied Science in 1926 with a B.S. in physics. He earned his...

  • Linus Pauling
    Linus Pauling
    Linus Carl Pauling was an American chemist, biochemist, peace activist, author, and educator. He was one of the most influential chemists in history and ranks among the most important scientists of the 20th century...

  • Leó Szilárd
    Leó Szilárd
    Leó Szilárd was an Austro-Hungarian physicist and inventor who conceived the nuclear chain reaction in 1933, patented the idea of a nuclear reactor with Enrico Fermi, and in late 1939 wrote the letter for Albert Einstein's signature that resulted in the Manhattan Project that built the atomic bomb...

  • Victor Weisskopf


Half the members had worked directly on the Manhattan Project and all had been indirectly involved or consulted on the production of the first atomic bomb.

Several members of the committee gave lecture tours to promote the committee's message of peace.
They produced supporting promotional materials, including one of the first films to illustrate what a full nuclear war might be like. ECAS was also very vocal in its opposition of the development of the first hydrogen bomb.

ECAS was active for four years, until 1950 when it was gradually disbanded, although most of the members continued to campaign against nuclear war, and participated in the Pugwash Conferences on Science and World Affairs
Pugwash Conferences on Science and World Affairs
The Pugwash Conferences on Science and World Affairs is an international organization that brings together scholars and public figures to work toward reducing the danger of armed conflict and to seek solutions to global security threats...

.

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