Question

Why did Einstein wrote a letter to Franklin Roosevelt?​

Answer 1

Answer:

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.

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Answer 2

Answer:

With the emergence of Nazis in Germany,

Einstein emigrated to the United States. It was the fact that the Nazis had the ability to develop the atomic bomb. It could destroy the whole world. So he warned Franklin D. Roosevelt in his letter.