Korean philosophy focuses on a totality of world view. Some aspects of Shamanism, Buddhism, and Neo-Confucianism were integrated into Korean philosophy. Traditional Korean thought has been influenced by a number of religious and philosophical thought-systems over the years. As the main influences on life in Korea, often Korean Shamanism, Korean Taoism, Korean Buddhism, Korean Confucianism and Silhak movements have shaped Korean life and thought. From 20th century, various Western philosophical thoughts have strongly influenced on Korean academia, politics, and daily life. Three Kingdoms of Korea, Northern and Southern States period, and Goryeo Korean shamanism Taoism Buddhism Korean Buddhist thinkers refined ideas originally introduced from China into a distinct form. The Three Kingdoms of Korea introduced Buddhism to Japan, from where it was popularized in the West. Today, Korean Buddhism consists mostly of the Seon lineage, which is derivative of the Chan (Zen) Buddhism of China and precursor to Zen Buddhism known in the West through Japan. Buddhist temples can be found in most parts of Korea and many are considered national treasures. Confucianism One of the most substantial influences in Korean intellectual history was the introduction of Confucian thought as part of the cultural exchange from China. Today the legacy of Confucianism remains a fundamental part of Korean society, shaping the moral system, the way of life, social relations between old and young, and high culture, and even survived the modernization of the legal system. Joseon Neo-Confucianism This dynasty arose out of the military dictatorships and chaos of the preceding era. Transition in this era was from Buddhism to a soldierly approach to Neo-Confucianism. Much work was done, especially on commentaries, and the Chu Hsi school represented indeed the golden age of Korean religious philosophy. Metaphysical research at this time investigated the theological relations between principle (i) and material/vital force (ki), and between as well the four beginnings (sadan), and the seven feelings (ch'ilchong); with the division of the Joseon Confucianists into two leading schools: one on "force" and one on "principles". The philosopher Hwadam ( Suh Kyungduk, 1489–1546 ) moved to integrate i and ki and spoke of Great Harmony (taehwa). In the Four–Seven Debate with Ki Daesung, Toegye ( Yi Hwang, 1501 – 70 ), while being still dualistic, broke away from Chu Hsi by espousing the reciprocal emanation (hobal) of i and ki: with the Four, ki follows i when i becomes emanant; with the Seven, when