Thailand's Buddhism is strongly influenced by traditional beliefs about the primal and natural spirits that have flowed into Buddhist cosmology. Before the rise of Theravada Buddhism, both the Indian-Brahman religion and Mahayana Buddhism were present in Thailand. The Thai culture is strongly influenced by religion. Cross-cultural guide to Thai culture, society, language, etiquette, manners, customs and protocol. Its name" Thailand" is associated with the dominant ethnic group Thai.