This final volume of Vernon Louis Parrington's Pultzer Prize-winning study deals with the decay of romantic optimism. It shows that the cause of decay is attributed to three sources: stratifying of economics under the pressure of centralization; the rise of mechanistic science; and the emergence of a spirit of skepticism which, with teachings of the sciences and lessons of intellectuals, has resulted in the questioning of democratic ideals. Parrington presents the movement of liberalism from 1913 to 1917, and the reaction to it following World War I. He notes that liberals announced that...