Albert Einstein Quotes
You cannot simultaneously prevent and prepare for war.
Einstein, Albert. Einstein on Peace. Edited by Otto Nathan and Heinz Norden, Schocken Books, 1960.
Essentially similar ideas were expressed earlier by George Washington and in antiquity by Vegetius and Horace.
This was the week after he returned from his meeting with Hitler in Munich where he appeased the German Dictator. See {585941} for his famous naive statement.
This was in the middle of the Cold War and the political leaders had to face the fact that their major military nuclear weapons, as a practical matter, could not be used. The result was not only too destructive but retaliation would produce MAD: Mutually Assured Destruction.
Albert Einstein was a German-born theoretical physicist, widely acknowledged to be one of the greatest physicists of all time. Einstein is known for developing the theory of relativity, but he also made important contributions to the development of the theory of quantum mechanics. Relativity and quantum mechanics are together the two pillars of modern physics. His mass–energy equivalence formula E = mc2, which arises from relativity theory, has been dubbed "the world's most famous equation". His work is also known for its influence on the philosophy of science. He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory. His intellectual achievements and originality resulted in "Einstein" becoming synonymous with "genius".