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Why were Buddhism and Confucian education introduced in Goguryeo?

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In the kingdom of Goguryeo, the introduction of Buddhism and Confucianism in 372 ce served specific strategic purposes for the state's development.1

Buddhism: It was adopted to provide ideological backing for the newly developed centralized bureaucracy, helping to legitimize and strengthen royal authority.1
Confucian Education: It was emphasized to help maintain the social order within the kingdom.1

These adoptions occurred as Goguryeo was transitioning into a full-fledged aristocratic state under the reign of King Sosurim, who implemented various laws and decrees to centralize power.1