The original religion of Korea had its roots in shamanism, which involved communicating with spiritual beings through rituals and ceremonies. Buddhism was introduced in the 4th century and quickly gained popularity, followed by Confucianism during the Goryeo Dynasty. Folk religions emerged as a response to the rigid social structure of Confucianism, blending shamanistic practices with elements of other religions. Taoism also had an impact on Korean religion, particularly on shamanism and folk religions. Christianity was introduced in the late 19th century and has since become one of the largest religions in Korea. Today, Korea is a predominantly secular society with diverse religious traditions that continue to evolve and adapt to changing social realities.