c attacks, but this time his house was broken into, and he was publicly considered an enemy of the nation. It was obvious that he could not return to Germany, and for the second time he renounced his German citizenship. During these early years in America he did some research at Princeton, but did not accomplish much of significance. In 1939 the second World War began to take form. There was heated argument during this time over whether the United States should explore the idea of an atomic bomb. Einstein wrote to President Roosevelt warning him of the disaster that could occur if the Nazi's developed it first. Einstein did not participate in the development of the bomb, but the idea did stem from his equation E=mc2. Just as he knew that the bomb was under development, he also knew when it was going to be used. Just before the bomb was dropped on Japan Einstein wrote a letter to the President begging him not to use this terrible weapon. The rest of Einstein's life was dedicated to promoting peace. After the war ended, he declared, "The war is won, but the peace is not." He wrote many articles and made many speeches calling for a world government. His fame, at this point, was legendary. People from all over would write to him for advice, and he would often answer them. He also continued his scientific research until the day he died. This was on April 18, 1955. There is no doubt that he was dissatisfied that he never was able to find the true meaning of existence that he strove for all his life. ...
