Fascism's ascent to power across Europe in the 1920s & 30s marks one of the greatest historical defeats of the left in history. Far from inevitable, this catastrophic defeat was resisted at every turn by Marxists of varying stripes who tried, unsuccessfully, to push the mass communist and social democratic parties to organize an opposition to the rising movements of violent reaction. This important volume offers the most complete selection of Marxist writings on fascism from this period in any language and provides invaluable lessons for contemporary readers concerned with today's far-right.