Stephen Pearl Andrews was an American libertarian socialist, individualist anarchist, linguist, political philosopher, outspoken abolitionist and author of several books on the labor movement and individualist anarchism.

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 with social anarchism, both individualist and social anarchism have influenced each other. Mutualism, an economic theory sometimes considered a synthesis of communism, market economy 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. 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. 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.