Clara Zetkin was a German Marxist theorist, activist, and advocate for women's rights. In 1911, she organized the first International Women's Day

Mike Taber is a longtime socialist activist and editor. He has edited or prepared dozens of books on the history of the revolutionary and working-class movement, including books by Leon Trotsky, V. I. Lenin, Malcolm X, James P. Cannon, Che Guevara, and Maurice Bishop. He currently lives in Chicago.

John Riddell has translated and edited seven volumes of documents of the Communist movement in the era of the Russian revolution. Two further Brill volumes now in preparation will complete this ambitious project.