Thanks for posting this quote.
Pierre Proudhon and one of his followers - Silvio Gesell in my view are the most relevant thinkers today. It is interesting that in the Communist block Pierre Proudhon was dismissed as a 'petit bourgeois philosopher', while at the same time being portrayed as an extreme leftie on the capitalist West. He is equally hated by the Bolshevik style statists, and by the rentseeking class.
It is nice to see people who quote him on Steemit, which otherwise dominated by the tribe of randists.