George Grosz's famous drawings of the plutocrats, militarists, industrialists, and war profiteers of the Weimar Republic speak as powerfully now as when they were first created, and Beth Lewis's penetrating account of the artist's career addresses the source of the passion behind the pictures: Grosz was a profoundly political man who raged against oppression and stupidity. He satirized the Germany of his time so bitterly and so perceptively that his...