Once Hinduism had purdah system and sati system. These were social superstitions which went away from the societal life over the years. And if you see, the Indian culture and ethos has also evolved the due course. ... Hinduism doesn't affect Indian culture ,it is the Indian culture.
The Himalayas were harsh, and hard to pass through. The climates were cruel and cold. Although, Hindu Kush was easier to pass through and typically had fair climate.
