Between 1936 and 1938, some 3,000 young Americans sailed to France and crossed the Pyrenees to take part in the brutal civil war raging in Spain. Virtually all joined the International Brigades, formed under the auspices of the Soviet-led Comintern and largely directed by Communists. Yet a large number were not Communists; their activism was inspired by domestic and international crises of the 1930s, and colored by idealism Th e men who went to Spain came out of a radical subculture that emerged from the Depression and the New Deal. Th is radicalism was a native plant, but it was nourished...