TLS signed “A. Einstein,” one page, 8.5 x 11, Emergency Committee of Atomic Scientists letterhead, November 21, 1946. Einstein, as Chairman of the Emergency Committee of Atomic Scientists, thanks a financial supporter. In part, “I thank you, for all the members of the Emergency Committee of Atomic Scientists, for your generous support of the work we have undertaken. I deeply appreciate both the time you were willing to devote to a consideration of the great problems facing us, and the financial help you pledged to carry out our task. To have such immediate help and generous indication of support from a small group of friends, gathered from all parts of the country, make us greatly hopeful of the success of our program.” The Emergency Committee of Atomic Scientists (ECAS) was founded by Albert Einstein and Leo Szilard in 1946. Its aims were to warn the public of the dangers associated with the development of nuclear weapons, promote the peaceful use of nuclear energy, and ultimately work towards world peace, which was seen as the only way that nuclear weapons would not be used again. The Committee was established in the wake of Szilard's 1945 petition to Truman opposing the use of the atomic bomb on moral grounds. 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. EACS was active for four years, until 1950 when it was gradually disbanded, although most of the members continued to campaign against nuclear war. In very fine condition, with two horizontal mailing folds. COA John Reznikoff/PSA/DNA and R&R COA.