To eat muffins and tell the harvest corn that pocorn season was almost here!! LOL jk it was so they could have and armed force and be able to follow what they believed in.
deterrence
Restrict the spread of communism in foreign countries
Imperialism is a policy in which a strong nation seeks to dominate other countries politically economically or socially.
Dorothy Garrett Melzer is known for writing "Moral Paradoxes of Nuclear Deterrence" which examines the moral implications of nuclear deterrence and the role of ethics in nuclear policy. She has also written on topics related to political philosophy and international relations.
mercantalism
Domino theory.
The name of the policy that allowed warring countries to buy American goods was known as the Neutrality Act. There were many of these acts passed during the 30s in the hopes to keep the United States out of another world war.
The company Dell is well known for making high quality products for very reasonable prices. Their servers follow the same policy, and are known for being very good.
fiscal policy
The Monroe Doctrine protected the Americas from colonization by other nations.
The Cuban Missile Crisis is the best example of American foreign policy of deterrence during the Cold War. As Russia was shipping nuclear arms to Cuba, America was utilizing its nuclear war resources in Turkey as a deterrent for continued action. By the Crisis' climax, American nuclear warheads were pointed at Russia via Turkey and Russian nuclear warheads were pointed at America via Cuba. Both sides brought each other to the brink of nuclear Holocaust (a policy known as Brinkmanship) and decided that it was in their own self-interest to avoid such a disaster (a stabilizing force in international relations known as Mutually Assured Destruction, or MAD) and an agreement was made to settle the international drama. American foreign policy during the cold war was very aggressive, and acted as a watchdog to deter the spread of Soviet Communism, also seen in international conflicts such as the Korean and Vietnam Wars, and actions taken in South America against communist rebels.
I believe this is known as Keynesien Fiscal Policy