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
What the Rose did to the Cypress and drank. A faqir asked him what he did there. He told him his story and asked the faqir's, repeating when the faqir put him off, until the faqir told him he had been a king, and his seven sons had all tried to win a princess whose hand could only be won by answering the riddle, "What did the rose do to the cypress?" and died for their failure. His grief sent him into the desert. This inspired the son with a love for the same princess. His attendants found him and brought him back, but he grew ill