Charles Johnson is an American writer associated with left-libertarianism and market anarchism, and a contributor to the Center for a Stateless Society (C4SS), a think tank that promotes stateless, anti-capitalist free-market ideas. Writing under his own name and long known online through his blog, he has helped articulate a strand of libertarian thought that rejects both state power and the concentrated economic hierarchies often defended in mainstream libertarian and conservative circles. His work draws on the individualist anarchist and mutualist traditions, treating markets freed of privilege as a means of dispersing power rather than entrenching it, and distinguishing sharply between markets as voluntary exchange and "capitalism" understood as a system of privilege backed by the state.
A recurring theme in Johnson's thought is what has come to be called "thick" libertarianism: the argument that a commitment to individual liberty carries with it, or is best sustained alongside, wider social commitments—against racism, patriarchy, and other forms of domination that do not always take the form of direct coercion. He has written extensively on the compatibility of libertarian principles with feminist and anti-authoritarian concerns, contending that opposition to unjust hierarchy should not stop at the boundary of the state. This positions him among thinkers who try to recover the historically radical and egalitarian dimensions of the libertarian tradition, in dialogue with figures such as Roderick Long and Gary Chartier.
Johnson is perhaps best known for co-editing, with Gary Chartier, an anthology gathering left-libertarian and market-anarchist writings that presented free markets as a vehicle for social justice and as opposed to state capitalism. Through this collection and his shorter essays and commentary, he has influenced a community of writers who describe themselves as left-libertarians, market anarchists, or "free-market anti-capitalists." His significance lies less in holding public office or building organizations than in helping define and popularize a distinctive intellectual position—one that insists radical anti-statism and radical social egalitarianism belong together, and that challenges the assumption that support for markets must mean support for existing corporate and hierarchical arrangements.