Note 18 — III.

See in this connection the famous monographs of Kropotkin, Mutual aid among the savages, in the "Nineteenth Century," April 9, 1891, and Among the barbarians, "Nineteenth Century," January, 1892, and also two recent articles signed: "Un Professeur," which appeared in the Revue Socialiste, of Paris, May and June, 1894, under the title: Lutte ou accord pour la vie.