Joseph Alexandre Saint-Yves, Marquis d’Alveydre was a French occultist who adapted the works of Fabre d'Olivet (1767–1825) and, in turn, had his ideas adapted by Gérard Encausse alias Papus. His work on "L'Archéomètre" deeply influenced the young René Guénon. He developed the term Synarchy—the association of everyone with everyone else—into a political philosophy, and his ideas about this type of government proved influential in politics and the occult.

Gérard Anaclet Vincent Encausse, whose esoteric pseudonyms were Papus and Tau Vincent, was a French physician, hypnotist, and popularizer of occultism, who founded the modern Martinist Order.