Murray Bookchin (1921-2006) was an American social theorist and political activist known for his work in the fields of ecology and libertarian socialism. He developed the concept of social ecology, which emphasizes the interconnectedness of social issues and environmental problems. Bookchin argued that ecological crises are rooted in social hierarchies and advocated for a decentralized, democratic society. Throughout his life, Bookchin wrote numerous books and articles, influencing various movements, including anarchism and green politics. He was a vocal critic of both capitalism and state socialism, promoting a vision of a society based on direct democracy and ecological sustainability. His ideas continue to inspire activists and scholars today.