Wissenschaft am Abgrund: Weltkrieg und Revolution
Einstein on Conscientious Objection to Military Service
I believe that a refusal on conscientious grounds to serve in the army when called up, if carried out by 50 000 men at the same moment, would be irresistible. The individual can accomplish little here, nor can one wish to see the best among us devoted to destruction at the hands of the machinery behind which stand three great powers: stupidity, fear, and greed.
(from: Ideas and Opinions, p. 109)