German Expressionists were uneasy and angry. Emerging at the dawn of the 20th century, they railed against Christian and bourgeois values as much as rampant urban industrialization. Anti-imperialist, they were dispersed, shattered, and depleted by the horrors of the First World War, and rallied their efforts only to be officially erased by the Nazi "Degenerate Art" exhibition of 1937. In this comprehensive TASCHEN collection, Head of the Gerhard...