[33] Die Ueberschätzung der Kunst (December 1914).
[34] Von der Vaterlandsliebe (January 1915).
[35] December 1914.
[36] Hymne auf den Schmerz (January 1915).—It is to be noted that the Forum is read in the trenches, and that it has received many letters of approval from the front. (Der Phrasenrausch und seine Bekaempfer, February 1915.)
[37] I take the phrase from M. Lucien Maury in an article written before the war: (Journal de Genève) March 30, 1914. This is quoted recently by M. Adolphe Ferrière who, in his remarkable Doctor's thesis, La loi du Progrès attempts to solve the tragic problem of the part played by the élite.
[38] The review Die Tat, published by Eug. Diederichs at Jena, prints long extracts from them in its issue for May 1915.
[39] With an introduction by C. E. Babut.
[40] 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.
[41] "The need of unity is the profoundest and noblest of the human mind" (La réalité du monde sensible).