Buddhism had dealt a heavy blow to Brahminical faith. Threatened with extinction, Hinduism started to re-organize itself. Attempts were now made to give up the complex system of rites and rituals and make Hinduism simple and attractive. The Hindus even came to accept the Buddha as a Hindu incarnation and accepted the principle of non-violence. This helped revive Hinduism and made it popular again. The decline of Buddhism became inevitable.
Buddhism faced divisions from time to time. Division into various splinter groups like ‘Hinayana’, ‘Mahayana’, ‘Vajrayana’, ‘Tantrayana’ and ‘Sahajayana’ led Buddhism to lose its originality. Also the influence of tantricism made people hate it. The simplicity of Buddhism was lost and it was becoming complex. This was enough for the people to keep away from it. The decline of Buddhism became a matter of time.
Pali and Prakrit, the spoken language of most people of India, was the medium for the spread of the message of Buddhism. But Sanskrit replaced these at the Fourth Buddhist Council during the reign period of Kaniska. Sanskrit was a complex language, hardly understood by common people. It was the unintelligible Sanskrit language that had accounted for the decline of Hinduism, earlier. Now, when Buddhism adopted that language, few people were able to understand it. People rejected what they could not understand.
In course of time there was the rise of the Brahminical faith once again. Pushyamitra Sunga, the Brahmin commander of the last Maurya ruler Vrihadratha, assassinated the king and founded the Sunga dynasty replacing the Maurya dynasty.