Sébastien Faure was educated under a rigorous religious discipline and instructed for the priestly office from his birth, in 1858. But after the death of his father decides to leave the seminary and return to civil life, where he discovers the contradictions that arise from the tense relation between the richest social sectors and those dispossessed, between power and submission. Active defender in the case Alfred Dreyfus, who is prosecuted for a crime of treason that he did not commit, Sébastien Faure expresses his position in the book The 69 anarchists and the 'affair' Dreyfus. He died on July 14, 1942 in the city of Royan, leaving one of the most valuable contributions to atheist thinking.