Pioneering participatory, social change-oriented media, the program had a national and international impact on documentary film-making, yet this is the first comprehensive history and analysis of its work. The volume's contributors study dozens of films produced by the program, their themes, aesthetics, and politics, and evaluate their legacy and the program's place in Canadian, Québécois, and world cinema. An informative and nuanced look at a cinematic movement, Challenge for Change reemphasizes not just the importance of the NFB and its programs but also the role documentaries can play in improving the world.