Anarchism Volume Two: The Anarchist Current (1939-2006) (Anarchism: a Documentary History of Libertarian Ideas)
Robert Graham has written extensively on the history of anarchist ideas. He is the author of "The Role of Contract in Anarchist Ideology," in the Routledge publication, For Anarchism, edited by David Goodway, and he wrote the introduction to the 1989 Pluto Press edition of Proudhon's General Idea of the Revolution in the 19th Century, originally published in 1851.