Steven Weinberg on Einstein’s mistakes, ending passage: Even though it was a mistake for Einstein to turn away from the exciting progress being made in the 1930s and 1940s by younger physicists, it revealed one admirable feature of his personality. Einstein never wanted to be a mandarin. He never tried to induce physicists in general to give up their work on nuclear and particle physics and follow his ideas. He never tried to fill professorships at the Institute for Advanced Studies with his collaborators or acolytes. Einstein was not only a great man, but a good one. His moral sense guided him in other matters: He opposed militarism during World War I; he refused to sup-port the Soviet Union in the Stalin years; he became an enthusiastic Zionist; he gave up his earlier pacifism when Europe was threatened by Nazi Germany, for instance urging the Belgians to rearm; and he publicly opposed McCarthyism. About these great public issues, Einstein made no mistakes.