Published in 1957, German Expressionist Painting was the first comprehensive study of one of the most pivotal movements in the art of this century. When it was written, however, German Expressionism seemed like an eccentric manifestation far removed from what was then considered the mainstream of modern art. But as historians well know, each generation alters the concept of mainstream to encompass those aspects of the past which seem most relevant to the present. The impact of German Expressionism on the art and thought of later generations could never have been anticipated at the time of the...