Stuart Cosgrove & Ewan MacColl 
Routledge Revivals: Theatres of the Left 1880-1935 (1985) [EPUB ebook] 
Workers’ Theatre Movements in Britain and America

First published in 1985, this book examines how workers theatre movements intended their performances to be activist — perceiving art as a weapon of struggle and enlightenment — and an emancipatory act. An introductory study relates left-wing theatre groupings to the cultural narratives of contemporary British socialism. The progress of the Workers’ Theatre Movement (1928-1935) is traced from simple realism to the most brilliant phase of its Russian and German development alongside which the parallel movements in the United States are also examined. A number of crucial texts are reprints as well as stage notes and glimpses of the dramaturgical controversies which accompanied them.