Of course, he's another non-authority thinker but with a quite different perspective and way to think the world, the society and men.
Take some of your time at gutenberg.org: - What is Property? by P.-J. Proudhon http://www.gutenberg.org/ebooks/360 - System of Economical Contradictions; or, the Philosophy of Misery by P.-J. Proudhon http://www.gutenberg.org/ebooks/444