In this important and wide-ranging critique of Rosa Luxemburg (1871-1919) Raya Dunayevskaya examines the life, political thought, and action of one of the most critical revolutionary figures of our time. Dunayevskaya sheds new light on the questions of socialist democracy after the revolution, disclosing both the unprobed feminist dimension of Rosa Luxemburg and the previously unrecognized new moments in Marx's last decade concerning the role of women and the peasantry. As the founder of Marxist-Humanism in the United States, Dunayevskaya (1910-87) was an internationally respected writer, philosopher, and revolutionary. This new and expanded edition includes two previously unpublished articles by Dunayevskaya, including her "Challenge to all Post-Marx Marxists."