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Why did the Joseon dynasty adopt Neo-Confucianism as its official ideology?

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Map of the Korean Peninsula highlighted in orange, showing North Korea in the north and South Korea in the south. The peninsula is bordered by China and Russia to the north, the Yellow Sea to the west, the East Sea (Sea of Japan) to the east, and Japan across the sea to the southeast. A small inset globe at the top left shows the peninsula's location in East Asia. — Korea Map of the Korean Peninsula, indicating northern and southern regions.

The Joseon dynasty adopted Neo-Confucianism as its official ideology primarily to replace Buddhism, which had become perceived as corrupt. This transition was driven by a new class of scholar-officials, known as sadaebu, who held Buddhism in disdain and sought a more rigorous, metaphysical framework to understand the universe and govern society.12

By embracing Neo-Confucianism, the Joseon state established a centralized, yangban-oriented government structure. This ideology provided a moral and intellectual foundation for the yangban—the hereditary aristocratic class—who dedicated themselves to the study of Confucian orthodoxy to secure public office through civil service examinations. The philosophy emphasized a hierarchical social order and practical engagement with law, politics, and ethics, which helped the dynasty consolidate control over land and administration. Ultimately, Neo-Confucianism served as the guiding principle for the state’s institutions, education, and the social conduct of its ruling elite.123