A direct, definite programme by a leading socio-economic thinker, whose famous ""Beveridge Plan"" forms the springboard for much of England's current and postwar social planning. With concision and clarity, this argues the need for an international rule of law if peace is to obtain after war. Here is the lesson expensively learned -- that purely ""self-regarding policies in international affairs lead only to mutual self-destruction"" -- that the international anarchy which has prevailed must be replaced by international authority. The failure of Versailles, where the victors were disunited -- when war was not outlawed; the chromic causes of war; and lastly, the method of lasting peace, a world wide rule of law by armed force, a law which can be enforced and revised, and which provides compulsory arbitration of issues between nations-issues of boundaries, colonies, economic relations, minorities.