Proudhon goes on to suggest that the real laws by which society functions have nothing to do with authority; they are not imposed from above, but stem from the nature of society itself. He sees the free emergence of such laws as the goal of social endeavour. … Proudhon conceiving a natural law of balance operating within society, rejects authority as an enemy and not a friend of order, and throws back at the authoritarians the accusations leveled at anarchists; in the process he adopts the title he hopes to have cleared of obloquy.

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