"Anarchism" is a social philosophy that rejects authoritarian government and maintains that voluntary institutions are best suited to express man's natural social tendencies. Historically the word anarchist, which derives from the Greek an archos, meaning "no government," appears first to have been used pejoratively to indicate one who denies all law and wishes to promote chaos. It was used in this sense against the Levelers during the English Civil War and during the French Revolution by most parties in criticizing those who stood to the left of them along the political spectrum. The first use of the word as an approbatory description of a positive philosophy appears to have been by Pierre-Joseph Proudhon when, in his Qu'est-ce-que la propriété? (What is property?, Paris, 1840), he described himself as an anarchist because he believed that political organization based on authority should be replaced by social and economic organization based...