Are traditions of popular theatre still alive in politically-engaged theatre to-day? In San Francisco they are. The San Francisco Mime Troupe is a modern link in the long history of public performances that have a merry air but have a voice of political protest and social comment. Every summer since 1962 the Troupe has taken free outdoor performances to public parks in the Bay Area. In a style that is festive and a spirit that is revolutionary the Mime Troupe has relied on popular theatre forms to address timely political and social issues. Their productions maintain a contemporary political edge, while showing their origins to be the popular traditions of the commedia dell"arte, circus clowning, vaudeville, puppetry, and minstrel shows. With The Minstrel Show or Civil Rights in a Cracker Barrel (1965) they expressed support of the civil rights movement. With L"Amant Militaire (1967) they voiced support of Vietnam War protests. To discover what makes these apparently frivolous...