**Why did Einstein write a letter to the American President?**

**Background:**
Albert Einstein was a renowned physicist who fled Nazi Germany during World War II and sought refuge in the United States. He was deeply concerned about the potential development of atomic weapons, particularly after the discovery of nuclear fission. As a pacifist and humanitarian, Einstein was troubled by the destructive capabilities of such weapons and the potential consequences for humanity. In light of these concerns, he decided to write a letter to the American President.

**The Manhattan Project:**
One of the main reasons behind Einstein's letter was the existence of the Manhattan Project, a top-secret scientific research program aimed at developing atomic bombs. Einstein, being one of the most prominent scientists of his time, was aware of the implications of such a project. He feared that the development and use of atomic weapons could lead to devastating consequences, not only in terms of loss of life but also in terms of the potential destruction of civilization.

**Einstein's Concerns:**
Einstein believed that if Germany managed to develop atomic weapons, it would pose a significant threat to the United States and the world. He was also worried about the possibility of a nuclear arms race between nations, which could escalate tensions and increase the likelihood of a catastrophic global conflict. Einstein's pacifist beliefs and his understanding of the destructive power of atomic weapons motivated him to take action.

**The Letter to President Roosevelt:**
On August 2, 1939, Einstein drafted a letter addressed to President Franklin D. Roosevelt. In the letter, he expressed his concerns about the possibility of Germany developing atomic weapons and urged the United States government to initiate its own research on nuclear technology. Einstein emphasized the importance of the United States taking the lead in this area to prevent Germany from gaining a significant advantage.

**Impact and Outcome:**
Einstein's letter played a crucial role in raising awareness about the potential dangers of atomic weapons. It led to the establishment of the Advisory Committee on Uranium, which eventually paved the way for the creation of the Manhattan Project. This project aimed to develop atomic bombs before Germany could, out of fear that Hitler's regime would deploy them as weapons of mass destruction.

**In conclusion, Einstein wrote a letter to the American President to express his concerns about the development of atomic weapons, especially after the discovery of nuclear fission. He hoped to bring attention to the potential destructive consequences and urged the United States to take the lead in nuclear research to prevent Germany from gaining an advantage. His letter ultimately played a significant role in the initiation of the Manhattan Project.

Einstein wrote a letter to American President to tell him about the destruction that can be caused by the atomic bomb as Germany was succeeded in making an atomic bomb. Einstein don't want that the atomic used should be used for bad consequences and destruction. After Einstein's letter America also made atomic bombs and dropped them in Nagasaki and Hiroshima of Japan. Einstein blamed himself for this destruction, he was thinking if he would have not told America about the atomic bomb, it would never had been happened.