In this, the first published collection of writings by Hippolyte Havel (1871–1950), Nathan Jun brings a crucial, yet largely forgotten revolutionary figure back into historical focus. Havel was a Czech anarchist at the center of New York’s political and artistic circles at the turn of the twentieth century. He was an editor of numerous publications, including Emma Goldman’s Mother Earth and his influence on several writers, artists, and intellectuals (including Eugene O’Neill, Joseph Stieglitz, and Sadakichi Hartmann) helped shape American modernism. Proletarian Days provides an illuminating introduction to the man and his times.