Denning's examination of the leftist, socialist, proletarian, avant-garde,CIO amalgamation in the era between the wars is an extremely informative analysis of the labor-based reaction to post-World War I's economic, political and social,development. Derailing the myth that much of the movement was communist based or inspired, Denning instead argues that the uniting of a variety of movements in the arts, politics, intellectual circles, and mass media illustrated the country's increasing interest in redefining the American dream as it applied to the lower and middle classes. His trenchant analysis is bolstered by a hostof references and examples, unearthing mounds of literary, artistic, governmental and social works that--though forgotten today--were hallmarks of the era. Ultimately, Denning is able to explain how America's shift to the left eventually gave way to a dialectic shift back to the right after World War II as the country's interest in promoting business and mass production overrode its desire to bring civil and economic liberties to all. I have yet to read any book that as thoroughly and convincingly documents this time period's absorption with mass culture.