This book, first published in 1949, analyses the thread of Christian anti-authority thought that runs through protests and revolts from the first days of Christianity to modern times. It examines social protests of the Middle Ages, through to the Reformation and the Peasant War of Germany, the English Civil War, Christian Socialists and fascism and bolshevism. It presents a clear case for the role of Christianity in social unorthodoxies, protests and revolts.