In the 6th century BC, India was in a transitional period from slave society to feudal society, which contradicted the main idea of ancient Brahmanism, that is, caste comes first and everything is sacrificed. Sacrifice and killing destroyed the agricultural economy, and caste first restricted the political rights of feudal upstarts. At this time, shamanism came into being, mainly Buddhism and Jainism, which were conquered, popularized and expanded by Ashoka's forces and became the main religions in India.

By the eighth century, Buddhism had developed into a very complicated Mahayana Sect, full of scholasticism, alienated from people's livelihood and no longer concentrated its power. At that time, Master Sankara appeared, studied Buddhism deeply and introduced it into Brahmanism, removed those factors that were not in line with social development, and gradually formed a new Brahmanism-Hinduism. Through the continuous integration of several generations of Hindu masters, he gradually regained religious authority in India because he was closer to the people.

In addition, the non-dualism of Vedanta, the main ideological center of Hinduism, originated from Buddhism and developed it. So people who don't understand, don't assume that Hinduism is not as good as Buddhism. In fact, Vedanta's non-dualism and Buddhism's middle view all come from the Upanishads of ancient Brahmanism, and Buddhism was not established out of thin air. Relatively speaking, India or Hinduism has a more social foundation, which has led to the present situation.