Albert Einstein Einstein did not return to Germany. He settled in the United States and became an American citizen in 1940. On the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential development of "extremely powerful bombs of a new type" and recommending that the US begin similar research. This eventually led to the Manhattan Project. Einstein supported the Allies, but he generally denounced the idea of using nuclear fission as a weapon. He signed the Russell–Einstein Manifesto with British philosopher Bertrand Russell, which highlighted the danger of nuclear weapons. He was
Albert Einstein Archives Albert Einstein Archives Albert Einstein Archives refers to an archive on the Givat Ram (Edmond J. Safra) campus of the Hebrew University of Jerusalem in Jerusalem, Israel housing the personal papers of 20th century physicist Albert Einstein. In his will, Albert Einstein left the Hebrew University his personal papers and the copyright to them. The Albert Einstein Archives contain some 55,000 items. In March 2012, the University announced that it had digitized the archive and was planning to make it more accessible online. The archive initially released 2,000 documents. Within the collection are his personal notes, love letters to various