He believes that Culbertson disapproves of both laissez-faire economics and economic imperialism, instead promoting a policy of international cooperation, to be effected through an organization such as the League of Nations. Reciprocity, A National Policy for Foreign Trade, 1937 In 1937, Culbertson published a book supporting the Hull reciprocal trade policy. According to a review by George H. E. Smith, Culbertson's thesis is that "[The United States has] become a world state... Our overseas expansion will go on whether we like it or not... Our production, our finance, and our trade then must operate on a world stage. If they are confined within our political frontiers by a narrow nationalism, no amount of governmental regulation and of governmental generosity will bring about real prosperity... I have become convinced that we cannot possibly pay out nationally except through a tremendous revival in foreign trade, both imports and exports, which in turn will stimulate and enlarge domestic trade and enterprise." The book continues by discussing the evolution of tariffs and the mechanisms through which they are made, and concludes with suggestions for a permanent foreign trade policy. The Culbertson Economic Mission, 1944 - 1945 In the fall of 1944, Culbertson led an economic mission on behalf of the United States to North Africa and the Middle East to survey post war prospects for business. This trip also included an independent assignment to France. According to analysis by John A. DeNovo, the mission revealed a strong belief in the free market for the regulation of international trade, analyzed obstacles to U.S. business in the Middle East, and revealed a vision of expanded U.S. involvement in Middle-East affairs. DeNovo also claims that the Culbertson reports were "taken seriously by those charting American economic policies." Liberation, The Threat and the Challenge of Power, 1953 Later in his life, Culbertson became a colonel in the United States Army, with a role of influencing the Eisenhower Administration's global politics. In 1953, he published Liberation, The Threat and the Challenge of Power, in which he contrasts policies of liberation and containment of the Soviet Union. Culbertson supports liberation as a method of avoiding preemptive war and argues that containment would do nothing to stem Soviet development of "super-weapons," but that American policies have considerable bearing on the practicality of liberation. Stefan T. Possony in a review of this work writes: "Colonel Culbertson views liberation as just such a