5. Albert Einstein’s Letter to Franklin D. Roosevelt
In 1939, Albert Einstein and physicist Leo Szilard co-authored a letter to President Franklin D. Roosevelt, warning of Nazi efforts to develop atomic weapons. This urgent note spurred the United States to launch the Manhattan Project, forever altering the course of history. Unlike routine scientific advocacy, Einstein’s letter fused scientific insight with grave international concern, demonstrating the immense responsibility borne by scientists. Its legacy stands as a powerful example of how a single letter can reshape global security.
