The Upanishads, or sacred Hindu texts, include the ideas of reincarnation and the caste system based on birthright, both of which have endured into modern times.
In ancient India, where Hinduism was founded, religion held great importance, Harl says, along with great literary traditions and incredible architecture. The Upanishads, or sacred Hindu texts, include the ideas of reincarnation and the caste system based on birthright, both of which have endured into modern times.