Why do Koreans sleep on the ground?

In fact, they sleep called tatami. Sleeping on the ground is not just the patent of Koreans and Japanese. At present, there are different forms and stages of living lifestyles in Africa, Southeast Asia, South America, China, Yunnan, Diaojiaolou residential areas and Mongolian nomadic areas. Seating is not only the inevitable choice of primitive inhabitants, but also runs through all stages of the development of human civilization, and is also moving from rural areas to cities. From tents (yurts), stilts, and heated beds (Korean warm beds), open garden houses are from a collective house (building), from rough to exquisite, from living space to emotional space with spiritual influence. So objectively speaking, sitting on the floor is mainly determined by historical conditions. Now many Korean and Japanese families have abandoned tatami that has been used for thousands of years and switched to beds.