British promoter of the League of Nations (Nations, League of), advocate of an international policing force to prevent war.

Davies was educated at King's College, Cambridge, and was a Labour member of the House of Commons (1906–29). He fought in World War I, after which he became closely associated with the work of the League of Nations. After the failure of the Disarmament Conference in 1933, he founded and acted as treasurer of the New Commonwealth Society, which worked to produce a more effective League of Nations with a police force and an impartial tribunal, with broad jurisdiction over international disputes. He wrote many books and pamphlets on this theme, including The Problem of the Twentieth Century (1930).