In Marxist philosophy, revisionism is a pejorative label given to various ideas, principles, and theories that are based on a fundamental reinterpretation of Marxism. According to critics of revisionism, this involves a significant deviation from mainstream Marxist tendencies, such as classical Marxism and orthodox Marxism, or a specific ideology held by the accuser, such as Marxism–Leninism, Maoism, or Trotskyism. The characteristics most attributed to revisionist Marxisms are the formation of an alliance with the bourgeoisie and rejecting the centrality of revolution in favor of reformism.