In "It Can't Happen Here," Sinclair Lewis explores the notion that the most passionate idealists, often seen as champions of societal progress, may actually hinder advancements rather than facilitate them. This provocative idea challenges the conventional belief that idealism inherently drives human development and improvement.

By posing the question of whether vigorous idealists can become obstacles, Lewis invites readers to reconsider the impact of certain ideologies and movements. This reflection raises concerns about the consequences of fervent beliefs that may lead to division rather than unity, ultimately questioning the true role of idealists in the trajectory of human progress.