Committing Theatre offers the first full-length historical study of political intervention theatre and theatrical spectatorship in English Canada. Building on twenty years of research and engagement in the field, this book’s historical narrative frames close-up examples of how theatre artists have intervened in and engaged with political struggle from the mid-19th century to the present. Lumber-camp mock trials, Mayday parades and street protests, the Workers Theatre Movement, agitprop theatre, the counter-culture theatre of the 1960s and 1970s, and more recent anarchist theatre collectives all played a role in a vibrant and unique radical theatre culture that went largely unnoticed, unrecorded, and undocumented by the professional theatre establishment.