In his new introduction to The Anarchists, Horowitz points out that anarchism is an ideology in search of a movement, and also a psychology in search of a polity

one: the theory; Introduction; one: Anarchism as a Critique of Society; two: Anarchism as a Style of Life; three: Anarchism as a System of Philosophy; Two: The Practice; One: The Historical Dimension; two: The Sociological Dimension