Film is the art form of our times. It has formed the background of our lives, informed visual arts practices, and formed our culture's stories, its memory. Moments of Perceptionis a landmark book. The first history of twentieth and early-twenty-first-century Canadian experimental filmmaking, it maps avant-garde films from the 1950s to the present day, including their contradictions and complexities. Experimental film is political in its very existence, critical of the status quo by definition.