Note 40 — Front matter (continued 3)
C. K. (Charles Kay) Ogden translation
His principal philosophical work is his Doctor's thesis: La réalité du monde sensible (1891). Another thesis (in Latin) dates from the same year: Des origines du socialisme allemand, in which he goes back to the Christian socialism of Luther.
His great historical work is his Histoire sociale de la Révolution. Very interesting is his discussion with Paul Lafargue on l'Idéalisme et le matérialisme dans la conception de l'histoire.