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P.-J. Proudhon, “Warning to the Proprietors” (Third Memoir on Property, 1841)
I have read the brochure entitled: Défense du fourièrisme, Réponse à MM. Proudhon, Lamennais, Reybaud, Louis Blanc, etc., and I am pleased with this publication, the author, despite the aberrations of his logic and the injustice of his reproaches, showing himself almost always a friend of progress and full of zeal for science and truth. […]