Who is the antagonist in The 42nd Parallel by John Dos Passos?

The author has always aimed at discomforting his readers, at stirring them into fresh thought and action by destroying the stereotypes from which they viewed the world. The great antagonist of U.S.A. is complacency. Probably most of the adverse criticism of the novel could be traced, like De Voto's, to the critics' protests against Dos Passos' attack on one or another of their complacencies. "When complacency goes," Dos Passos concluded his critical appreciation of Grosz, "young intelligence begins."