Revisionism, otherwise known as Marxist reformism, represents various ideas, principles, and theories that are based on a reform or revision of Marxism. According to their critics, this involves a significant revision of fundamental Marxist theories and premises, and usually involves making an alliance with the bourgeois class. Some academic economists have used revisionism to describe post-Stalinist, Eastern European writers who criticized one-party rule and argued in favour of freedom of the press and of the arts, intra- and sometimes inter-party democracy, independent labor unions, the abolition of bureaucratic privileges, and the subordination of police forces to the judiciary power.

Marxism is a political philosophy and method of socioeconomic analysis. It uses a materialist interpretation of historical development, better known as "historical materialism," to understand class relations and social conflict. It also uses a dialectical perspective to view social transformation. Marxism originates from the works of 19th-century German philosophers Karl Marx and Friedrich Engels. Marxism has developed over time into various branches and schools of thought, As a result, there is no single, definitive Marxist theory. Marxism has had a profound impact in shaping the modern world, with various left-wing and far-left political movements taking inspiration from it in varying local contexts.