Marx and Engels were "the founders of modern revolutionary democratic socialism", described as a form of "socialism from below" that is "based on a mass working-class movement, fighting from below for the extension of democracy and human freedom". This type of socialism is contrasted to that of the "authoritarian, antidemocratic creed" and "the various totalitarian collectivist ideologies which claim the title of socialism" as well as "the many varieties of 'socialism from above' which have led in the twentieth century to movements and state forms in which a despotic 'new class' rules over a statified economy in the name of socialism", a division that "runs through the history of the socialist movement". Lipow identifies Bellamyism and Stalinism as two prominent authoritarian socialist currents within the history of the socialist movement. Libertarian socialism Libertarian socialism, sometimes called left-libertarianism, social anarchism and socialist libertarianism, is an anti-authoritarian, anti-statist and libertarian tradition within socialism that rejects centralised state ownership and control including criticism of wage labour relationships (wage slavery) as well as the state itself. It emphasises workers' self-management and decentralised structures of political organisation. Libertarian socialism asserts that a society based on freedom and equality can be achieved through abolishing authoritarian institutions that control production. Libertarian socialists generally prefer direct democracy and federal or confederal associations such as libertarian municipalism, citizens' assemblies, trade unions and workers' councils. Anarcho-syndicalist Gaston Leval explained: All of this is typically done within a general call for libertarian and voluntary free associations through the identification, criticism and practical dismantling of illegitimate authority in all aspects of human life. As part of the larger socialist movement, it seeks to distinguish itself from Bolshevism, Leninism and Marxism–Leninism as well as social democracy. Past and present political philosophies and movements commonly described as libertarian socialist include anarchism (anarcho-communism, anarcho-syndicalism, collectivist anarchism, individualist anarchism and mutualism), autonomism, Communalism, participism, libertarian Marxism (council communism and Luxemburgism), revolutionary syndicalism and utopian socialism (Fourierism). Religious socialism Christian socialism is a broad concept involving an intertwining of Christian religion with socialism. Islamic socialism is a more spiritual form of socialism. Muslim socialists believe that the teachings of the Quran and Muhammad are not only compatible with, but actively promoting the principles of equality and public ownership, drawing inspiration from the early Medina welfare state he established. Muslim socialists are more conservative than their Western contemporaries and find their roots in anti-imperialism, anti-colonialism and sometimes, if