Hinduism originated from the Aryan people who brought Sanskrit and myths of gods to India between 1500-500 BC. Their hymns and rituals were collected in the Vedas, most importantly the Rig Veda. Later, the Upanishads provided interpretations of the Vedas and introduced concepts like Brahman, the universal spirit, and Atman, the individual soul/self. Hindus believe in reincarnation and strive for moksha, liberation from the cycle of rebirth. The caste system divided society but Hinduism reinforced it through karma and dharma despite not being its religious origin.