Question

Why did albert einstein write a letter to president roosevelt in 1939?

Answer 1

The Einstein–Szilárd letter was a letter written by Leó Szilárd and signed by Albert Einstein that was sent to the United States President Franklin D. Roosevelt on August 2, 1939. ... It prompted action by Roosevelt, which eventually resulted in the Manhattan Project developing the first atomic bombs

Answer 2

Answer:

When the Nazis came to power in Germany, Einstein emigrated to the United States of America. Five years later, the discovery of nuclear fission in Berlin had American physicists in an uproar. Many of them had fled from Fascism, just as Einstein had, and now they were afraid the Nazis could build and use an atomic bomb. Einstein wrote a letter to Franklin Roosevelt to warn him of the consequences of the explosion of an atomic bomb.