He wrote "L'Aryen et son rôle social" (1899, "The Aryan and his Social Role"), in which he opposed the white, Aryan race, dolichocephalic, to the brachycephalic race, whom the Jew is the archetype.
He wrote "L'Aryen et son rôle social" (1899, "The Aryan and his Social Role"), which gave its bases to Nazi anti-semitism. He opposed the white, Aryan race, dolichocephalic, to the brachycephalic race, whom the Jew is the archetype.