Hinduism is one of the oldest known organized religions—its sacred writings date as far back as 1400 to 1500 B.C. It is also one of the most diverse and complex, having millions of gods. Hindus have a wide variety of core beliefs and exist in many different sects. Although it is the third largest religion in the world, Hinduism exists primarily in India and Nepal.The main texts of Hinduism are the Vedas (considered most important), Upanishadas, the Mahabharata, and the Ramayana. These writings contain hymns, incantations, philosophies, rituals, poems, and stories from which Hindus base their beliefs. Other texts used in Hinduism include the Brahmanas, the Sutras, and the Aranyakas.