It was inevitable that the end of the World War should be followed by a revival of interest in the systematic development of the law of nations. Such a result was foreseen by W. E. Hall as long ago as 1890, but the extent of the revival and its consequences were pictured by him in terms altogether too sanguine. Many of the people who have expected the experience of the war to be capitalized in an immediate clarification of the laws of war must have been greatly disappointed by the events of the past years. A struggle which aroused so many passions, which divided a large part of the human race into hostile camps, could not possibly have produced the conditions necessary for building a new law which would embody the common views of people in many countries; but perhaps it did serve to direct attention to the lawless character of international relations in certain fields, and thus gave to politicians and lawyers opportunity for extending and improving the law governing such relations. If there has not been a general unanimity of opinion as to the method to be followed and the direction to be taken, the opportunity has not been neglected, and currents are now under way and agencies have been created which promise a continued if not a consistent progress for the future.