Answer:
The Yalta Conference essentially confirmed the accords reach in the previous Allied conference at Teheran in 1943, in regards to the unconditional surrender of the Axis powers. What was confirmed in Yalta was the commitment to create a new international organization, better equipped than the previous Society of Nations. This organization would be the United Nations.
Explanation:
The Yalta Conference was the entry point of the Cold War, that would essentially began after the Postdam Conference in 1945. What made Yalta relevant, was the commitment to install the United Nations as a heir of the former Society of Nations of the 1920's, but with the aim that this new organization would have a better way of coercing nations to respect international laws. However the conference also saw the Soviet Union using the leverage it had regarding the war, to make the US help it to force Britain to accept for example the Soviet occupation of Poland, in exchange for the Soviet war declaration over Japan.
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Graham Sumner is known for his tendencies to defend extreme freedom. Socialism prevents this perspective because it plans the economy. Manifest destiny prevents this perspective because it defends a kind of determinism and the Gospel of Wealth ends up falling into the same mistakes. Sumner would be closer to the idea of "Laissez-faire," since he is also known as a type of libertarian and would therefore defend the free market.
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Benefits of a map is that it can help direct you to were you want to go