Elizabeth Gurley Flynn is one of the most important figures in the history of the US left. Her participation in “the working-class movement,” as she called it, spanned nearly six decades, from 1906 to 1964. Inspired by the Irish freedom struggle and appalled by the exploitation and grinding poverty she witnessed around her, Flynn dedicated herself to the abolition of capitalism and the liberation of workers everywhere first as a Socialist, then a Wobbly syndicalist, and finally a Communist. She organized workers into unions; led strikes in a variety of industries; supported...