In the history of the World a lost civilization in East Asia, named ‘Go Joseon Civilization’ existed between 30BCE and 3 BCE. In the Go Joseon Civilization a common Go Joseon language prevailed, and after the disintegration of the Go Joseon state, the population dispersed and migrated to different areas and became the ancestral language of the Ural-Altai Language family.
Dangun (Dangul) served as common religious belief of the Go Joseon Civilization, and the Go Joseon state was also uniformly founded on the bronze and iron culture with its unique design. The constituent population was horse-riding race. The Go Joseon Civilization also boasted a unique folk culture and festival culture. Various racial groups who called their ruler “Khan” or “Han” were either the constituent population of the Go Joseon civilization or their descendants.