In this collection, written between the 1950s and 1980s and published for the first time in English, Guerin not only provides a critique of the socialist and communist parties of his day, he analyses some of the most fundamental and pressing questions with which all radicals must engage. He does this by revisiting and attempting to draw lessons from the history of the revolutionary movement from the French Revolution, through the conflicts between anarchists and Marxists in the International Workingmen's Association and the Russian and Spanish revolutions, to the social revolution of 1968