Which tribe helped develop Hinduism?

These immortal quotes of Mahatma Gandhi, in short sum up what Hinduism is all about. Hinduism is not a religion but a way of life. Yes a way of life for human beings as designed by the creator himself.

"Hinduism is like the Ganga, pure and unsullied at its source but taking in its course the impurities in the way. Even like the Ganga it is beneficent in its total effect. It takes a provincial form in every province, but the inner substance is retained everywhere." (ibid., 8-4-1926