"Whoever denies authority and fights against it is an anarchist," said Sebastien Faure. The definition is tempting in its simplicity, but simplicity is the first thing to guard against in writing a history of anarchism. Few doctrines or movements have been so confusedly understood in the public mind, and few have presented in their own variety of approach and action so much excuse for confusion.

Prologue - Anarchism : A History of Libertarian Ideas and Movements (1962)