What influence did the shoguns have in Japanese history?

Tokugawa Ieyasu's dynasty of shoguns presided over 250 years of peace and prosperity in Japan, including the rise of a new merchant class and increasing urbanization. To guard against external influence, they also worked to close off Japanese society from Westernizing influences, particularly Christianity.

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. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.