Changes in foreign policy should be measured by study of changein public opinion on national interests and changes in external conditions affecting those interests, but some indications are furnished by examination of the official American acts or declarations with respect to intenational relations. President Hoover has instituted a more active policy looking toward implementing the Kellogg Pact by international co-operation. The traditional policies of treating immigration and the tariff as domestic questions, of policing the Caribbean, of assisting China to autonomy, of avoiding European commitments which might imply a duty to use force, and of promoting arbitration and disarmament have continued with an increasing tendency on the part of the administration, if not of the Senate, to adjust the others to the last policy. There has been much interest in the ideas, deduced from the Kellogg Pact, that neutrality is obsolete and that American consultation with the great powers on issues threatening war anywhere should be institutionalized.