If all the people of Thailand are Thai, not all are of THAI origin. The Thais are from an ethnic family whose different tribes come from China, Burma and Laos.
The Chinese (about 3 million, mostly related) population, have acquired Thai nationality. Mountain minorities have settled in the mountains of the North. There are also 100 000 Mon (original inhabitants before the arrival of Thaïs) in the Central Plains and some Khmers at the Cambodian border.
The culture of Thailand is deeply imbued with Theravada Buddhism, the official religion practiced by most of the population (4% Muslim and less than 1% Christian). Much of the arts, painting, sculpture, architecture, dance and music undergoes this influence and serves traditional representations of Buddhism and its derivatives. In accordance with the teachings of Buddha, monks practice asceticism. Every morning, they will get their food from the residents and traders at 6 a.m.
Theravada Buddhism is the oldest form of the doctrine of Buddhism. It is called (the small car) in the sense that the follower of Buddha can achieve salvation without the intermediary of a redeemer or a grace from outside, but only following the doctrine. This is possible only for the monks who follow these precepts closely.
There is also a greater sustainability of animist beliefs. They manifest themselves in the belief of magic amulets and the domestic worship of the “spirits of the place” (chao thi), which are devoted houses of spirits, small shrines present at homes or shops (where possible), and Thais thank and pray every day if they can by offerings (necklaces of flowers and food).
In Thailand, we speak of “cultures” rather than “culture”, namely: Buddhist culture, traditional secular culture and Muslim culture. Muslims live in the south on the peninsula, near the border with Malaysia, in the three provinces of Pattani, Yala and Narathiwat.