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Why did Buddhism become important to the governments of the Three Kingdoms?

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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.

During the Three Kingdoms period, Buddhism became important to the governments of Goguryeo, Baekje, and Silla primarily because it served as a vital ideological foundation for the state.12

As these kingdoms evolved into centralized aristocratic states, their rulers sought to consolidate royal authority and unify their populations. Buddhism was adopted and promoted by the courts as a state religion, functioning as a source of protection and welfare for the nation. Specifically, in the case of Goguryeo, the introduction of Buddhism in 372 CE provided the necessary ideological backing for the newly developed centralized bureaucracy.12

By positioning the faith as a spiritual pillar of the government, the monarchs of the Three Kingdoms were able to strengthen their political legitimacy and maintain social order, effectively integrating the religion into the administrative and cultural fabric of their respective states.12