War II, during the Allied occupation of Germany, the United States investigated many officials and public figures to determine if they should face charges of war crimes at the Nuremberg trials. Haushofer, an academic primarily, was interrogated by Father Edmund A. Walsh, a professor of geopolitics from the Georgetown School of Foreign Service, at the request of the U.S. authorities. Despite his involvement in crafting one of the justifications for Nazi aggression, Fr. Walsh determined that Haushofer ought not stand trial. Cold War After the Second World War, the term "geopolitics" fell into disrepute, because of its association with Nazi geopolitik. Virtually no books published between the end of World War II and the mid-1970s used the word "geopolitics" or "geostrategy" in their titles, and geopoliticians did not label themselves or their works as such. German theories prompted a number of critical examinations of geopolitik by American geopoliticians such as Robert Strausz-Hupé, Derwent Whittlesey and Andrew Gyorgy. As the Cold War began, N.J. Spykman and George F. Kennan laid down the foundations for the U.S. policy of containment, which would dominate Western geostrategic thought for the next forty years. Alexander de Seversky would propose that airpower had fundamentally changed geostrategic considerations and thus proposed a "geopolitics of airpower." His ideas had some influence on the administration of President Dwight D. Eisenhower, but the ideas of Spykman and Kennan would exercise greater weight. Later during the Cold War, Colin Gray would decisively reject the idea that airpower changed geostrategic considerations, while Saul B. Cohen examined the idea of a "shatterbelt", which would eventually inform the domino theory. Post-Cold War After the Cold War ended, states started preferring management of space at low cost to expansion of it with military force. Use of military force in order to secure space causes not only great burden on countries, but also severe criticism from the international society as interdependence between countries continuously increases. As a way of new space management, countries either created regional institutions related to the space or make regimes on specific issues to allow intervention on space. Such mechanisms let countries to have indirect control over space. The indirect space management reduces required capital and at the same time provides justification and legitimacy of the management, that the countries involved do not have to face criticism from the international society. Notable geostrategists The below geostrategists were instrumental in founding and developing