Libertarian socialist in the context of "Individualist anarchism in the United States"

Murray Bookchin (/ˈbʊktʃɪn/; January 14, 1921 – July 30, 2006) was an American social theorist, author, orator, historian, and political philosopher. Influenced by G. W. F. Hegel, Karl Marx, and Peter Kropotkin, he was a pioneer in the environmental movement. Bookchin formulated and developed the theory of social ecology and urban planning within anarchist, libertarian socialist, and ecological thought. He was the author of two dozen books covering topics in politics, philosophy, history, urban affairs, and social ecology. Among the most important were Our Synthetic Environment (1962), Post-Scarcity Anarchism (1971), The Ecology of Freedom (1982), and Urbanization Without Cities (1987). In the late 1990s, he became disenchanted with what he saw as an increasingly apolitical "lifestylism" of the contemporary anarchist movement, stopped referring to himself as an anarchist, and founded his own libertarian socialist ideology called "communalism", which seeks to reconcile and expand Marxist, syndicalist, and anarchist thought.

Bookchin was a prominent anti-capitalist, anti-fascist and advocate of social decentralization along ecological and democratic lines. His ideas have influenced social movements since the 1960s, including the New Left, the anti-nuclear movement, the anti-globalization movement, Occupy Wall Street, and the democratic confederalism of the Democratic Autonomous Administration of North and East Syria. He was a central figure in the American green movement. An autodidact who never attended college, he is considered to be one of the most important left theorists of the twentieth century.

The Ecology of Freedom: The Emergence and Dissolution of Hierarchy is a 1982 book by the American libertarian socialist and ecologist Murray Bookchin, in which the author describes his concept of social ecology, the idea that human social problems cause ecological problems and can be solved only by reorganizing society along ecological and ethical lines. The book is considered Bookchin's magnum opus, but it has also been criticized as utopian.

Individualist anarchism or anarcho-individualism is a collection of anarchist currents that generally emphasize the individual and their will over external determinants such as groups, society, traditions, and ideological systems.

Individualist anarchism can be divided into two main distinct movements, each with its own ideological orientations and choices. On one hand, there is American individualist anarchism, which began with Warren in the 1860s. It focuses primarily on economic freedom, drawing upon Stirner's egoist anarchism and Proudhon's mutualism, and develops perspectives that are notably financial in nature. 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.

The People's Defense Units (YPG), also called People's Protection Units, is a libertarian socialist US-backed Kurdish militant group in Syria and the primary component of the Syrian Democratic Forces (SDF).

The YPG mostly consists of Kurds, but also includes Arabs and foreign volunteers; it is closely allied to the Syriac Military Council, an Assyrian militia. The YPG was formed in 2011. It expanded rapidly in the Syrian Civil War and came to predominate over other armed Syrian Kurdish groups. A sister militia, the Women's Protection Units (YPJ), fights alongside them. The YPG is active in the Autonomous Administration of North and East Syria (Rojava), particularly in its Kurdish regions.