Brahmanism is an early religion in India. Because it was born out of ancient nature worship, it formed three programs: Brahman first, Vedic apocalypse and universal sacrifice. With the feudal process of society, the traditional three programs have seriously undermined social stability. For example, social aristocrats changed from priests to military aristocrats (kings, warriors, etc.). , belonging to the second level of caste system), so the Brahman supremacy will affect the internal operation of feudal countries. Social accumulation changed from primitive hunting to feudal farming, and sacrifice became universal slaughter of livestock, which seriously damaged social wealth. Because the above problems of Brahmanism involve many interests of ancient India, from the nobility to the poor, Jainism and Buddhism formed two new schools of thought around the sixth century BC. They all opposed caste system and killing, which were collectively called shamanism at that time. These two new religions are supported by military nobles. Struggled with Brahmin priests and nobles, won the victory and defeated ancient Brahmanism. Although the latter two religions came into being because of their opposition to Brahmanism, their basic philosophical logic is the same, and both of them are rooted in the development of the primitive philosophical system in ancient India. Therefore, after the decline of Buddhism and Jainism, ancient Brahmanism absorbed the teachings of these two religions and formed the present Hinduism. In a word, these three religions are on the level of religious philosophy.