Individualist anarchism is the branch of anarchism that emphasizes the individual and their will over external determinants such as groups, society, traditions and ideological systems. Although usually contrasted to social anarchism, both individualist and social anarchism have influenced each other. Some anarcho-capitalists claim anarcho-capitalism is part of the individualist anarchist tradition, while others disagree and claim individualist anarchism is only part of the socialist movement and part of the libertarian socialist tradition. Mutualism, an economic theory sometimes considered a synthesis of communism and property, has been considered individualist anarchism and other times part of social anarchism. Many anarcho-communists regard themselves as radical individualists, seeing anarcho-communism as the best social system for the realization of individual freedom. Economically, while European individualist anarchists are pluralists who advocate anarchism without adjectives and synthesis anarchism, ranging from anarcho-communist to mutualist economic types, most American individualist anarchists of the 19th century advocated mutualism, a libertarian socialist form of market socialism, or a free-market socialist form of classical economics. Individualist anarchists are opposed to property that violates the entitlement theory of justice, that is, gives privilege due to unjust acquisition or exchange, and thus is exploitative, seeking to "destroy the tyranny of capital, — that is, of property" by mutual credit.
Individualist anarchism represents a group of several traditions of thought and individualist philosophies within the anarchist movement. Among the early influences on individualist anarchism were William Godwin (philosophical anarchism), Josiah Warren (sovereignty of the individual), Max Stirner (egoism), Lysander Spooner (natural law), Pierre-Joseph Proudhon (mutualism), Henry David Thoreau (transcendentalism), Herbert Spencer (law of equal liberty) and Anselme Bellegarrigue (civil disobedience).