October 11 2021 — On October 11 1939, Alexander Sachs, Wall Street economist and longtime friend and unofficial advisor to President Franklin Delano Roosevelt, met with the President to discuss a letter written by Albert Einstein the previous August. Einstein had written to inform Roosevelt that recent research on fission chain reactions utilizing uranium made it probable that large amounts of power could be produced by a chain reaction and that, by harnessing this power, the construction of “extremely powerful bombs” was conceivable. Follow us on Twitter: @INTEL_TODAY
RELATED POST: The Los Alamos Primer — The Bethe – Feynman Equation [Nukes & Secrecy]
RELATED POST: The Los Alamos Primer — An Introduction
RELATED POST: On This Day — Einstein Writes : “E = m c2” [UPDATE – Joke]
RELATED POST: On This Day — Atomic Spies Rosenbergs Executed (June 19 1953)
RELATED POST: Remembering Hiroshima (August 6 1945)
Einstein believed the German government was actively supporting research in this area and urged the United States government to do likewise. Sachs read from a cover letter he had prepared and briefed Roosevelt on the main points contained in Einstein’s letter.
Initially the President was noncommittal and expressed concern over locating the necessary funds, but at a second meeting over breakfast the next morning Roosevelt became convinced of the value of exploring atomic energy.
Einstein drafted his famous letter with the help of the Hungarian émigré physicist Leo Szilard, one of a number of European scientists who had fled to the United States in the 1930s to escape Nazi and Fascist repression.
Szilard was among the most vocal of those advocating a program to develop bombs based on recent findings in nuclear physics and chemistry.
Those like Szilard and fellow Hungarian refugee physicists Edward Teller and Eugene Wigner regarded it as their responsibility to alert Americans to the possibility that German scientists might win the race to build an atomic bomb and to warn that Hitler would be more than willing to resort to such a weapon.
But Roosevelt, preoccupied with events in Europe, took over two months to meet with Sachs after receiving Einstein’s letter. Szilard and his colleagues interpreted Roosevelt’s inaction as unwelcome evidence that the President did not take the threat of nuclear warfare seriously.
Roosevelt wrote Einstein back on October 19, 1939, informing the physicist that he had set up a committee consisting of civilian and military representatives to study uranium.
Events proved that the President was a man of considerable action once he had chosen a direction.
In fact, Roosevelt’s approval of uranium research in October 1939, based on his belief that the United States could not take the risk of allowing Hitler to achieve unilateral possession of “extremely powerful bombs,” was merely the first decision among many that ultimately led to the establishment of the Manhattan Project.
The Einstein–Szilárd letter
“I made one great mistake in my life…”
According to Linus Pauling, Einstein later regretted signing the letter because it led to the development and use of the atomic bomb in combat, adding that Einstein had justified his decision because of the greater danger that Nazi Germany would develop the bomb first.
In 1947 Einstein told Newsweek magazine that “had I known that the Germans would not succeed in developing an atomic bomb, I would have done nothing.” [Wikipedia — Einstein–Szilárd letter]
The Letter That Led to the Atomic Bomb
EINSTEIN’S LETTER — The Manhattan Project
On This Day — Einstein Letter to FDR (October 11 1939)
80 Years Ago — Einstein Letter to Franklin Roosevelt (October 11 1939) [Manhattan Project]
On This day — Einstein Letter to Franklin Roosevelt (October 11 1939) [Manhattan Project]
On This day — Einstein Letter to Franklin Roosevelt (October 11 1939) [Manhattan Project — “I made one great mistake in my life…”]