Murray Bookchin (1921—2006) developed the concepts of Social Ecology and Communalism into a body of radical ideas. He was a significant social theorist on the Left throughout his life, and his many books include Post-Scarcity Anarchism, The Ecology of Freedom, From Urbanization to Cities, The Philosophy of Social Ecology, Re-enchanting Humanity and The Third Revolution.

July 30th, 2006, Bookchin died— after a long and active life as revolutionary, being deeply involved in the labor movement, in the civil rights movement, in urban activism, and in Green politics. Bookchin was a pioneer of the ecology movement, and he co-founded The Institute for Social Ecology in 1974. Bookchin was on the first editorial board of the journal Communalism.