The main criticisms of Marxist theory include its deterministic view of history, overemphasis on class conflict, and belief in the inevitability of a proletariat revolution. Critics argue that it neglects other forms of identity and conflict (such as race, gender, or religion), underestimates the resilience of capitalism, and overlooks the potential for non-revolutionary paths to social change. Furthermore, attempts to implement Marxist theory in practice, as in various forms of socialism and communism, have often resulted in authoritarian regimes and economic challenges.