Japan has many mountains, thus, the outsiders could not easily enter Japan and Japanese could not leave the country. And, thus the self-isolation was helped by the presence of a mountain terrain. This policy was implemented by Togukawa, who insisted on preventing Japan from foreigners.
They later became the United States constitution
Answer:
The Soviet Union and China were uneasy allies. Chinese communism differed from Soviet communism, especially on Marxist ideology. A main difference was their view of the peasantry as playing a major role in the communist revolution. On the other hand, Soviets put their trust in a "revolutionary elite" of intellectuals and urban workers instead of the rural poor. After border clashes and disagreements over ideology, in 1959 Soviets withdrew all of their aid and advisors from China, ending their alliance.
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