I should unconditionally refuse every direct or indirect war service and try to induce my friends to adopt the same attitude, irrespective of the general opinion of the causes of war.

Notes from Wikiquote

As quoted in Einstein Would Refuse Any War Services No Matter What the Cause // Jewish Telegraphic Agency Bulletin, September 8, 1929

Essay to Leo Baeck (1953)

Statement on the occasion of Gandhi's 70th birthday (1939)

Quote text and notes from Wikiquote: Albert Einstein (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.