The Decentralized Structure of Hinduism

Hinduism survived despite the entire subcontinent coming under, under foreign occupation for about 1000 years. Hinduism is a decentralized religion with no pope or top down hierarchy. It allowed Hinduism to survive the 1000 years roughly of foreign occupation in various parts of India. But it's also something that keeps the people who follow this faith disunited. Can you expect convergent evolution? Let's talk about the Big Bang. I have no theory of what was there before the Big Bang because we have no data.