Socialism and positive science. (Darwin - Spencer - Marx). Transl. from the French ed. of 1896 by E.C. Harvey.Evolutionary socialism: a criticism and affirmation. (Die Voraussetzungen des Sozialismus und die Aufgaben der Sozialdemokratie). Transl. by E.C. Harvey.Studies in socialism. Transl. with an introd. by M. Minturn.White capital and coloured labour.White capital and coloured labour.Socialism and the drink question.