1. India's history developed in isolation because they were separated by the Himalayas. This all changed when they were invaded by the or nomads from Central Asia. I 2. The Aryans brought holy texts with them known as which are the oldest scriptures of Hinduism. 3. These people brought with them the structure that kept natives in a lower caste. This was a social 4. The only way they could ever move into the caste system was through This is the belief that you could be reborn into another soul.​