With the war of Mahabharat and other events, Lord Krishna was able to unite India and uplift the Khstriya (administration) community which lasted well for next 3000 years till whence India saw its first invasion with Alexander. However, the downfall of the Brahmin (faculty) community had already started then. Learned people like Lord Krishna and Ved Vyaas contributed to literature that contained the essense of the Vedas. Till about more than 5000 years ago, Sanskrit was the most prominent language.
