William Godwin, "the author of the "Enquiry Concerning Political Justice" (1793), the first systematic text of libertarian politics, was a Calvinist minister who began by rejecting Christianity, and passed through deism to atheism and then what was later called agnosticism." The pioneering German individualist anarchist Max Stirner, "began as a left-Hegelian, post-Feuerbachian atheist, rejecting the ‘spirit’ (Geist) of religion as well as of politics including the spook of ‘humanity’". Pierre-Joseph Proudhon, "the first person to call himself an anarchist, who was well known for saying, ‘Property is theft’, also said, ‘God is evil’ and ‘God is the eternal X’".