Religion of India established between the 7th and 5th centuries BCE. It was founded by Vardhamana, who was called Mahavira, as a reaction against the Vedic religion, which required animal sacrifices. Jainism's core belief is ahimsa, or noninjury to all living things. Jainism has no belief in a creator god, though there are a number of lesser deities for various aspects of life. Jains believe their religion is eternal and hold that it was revealed in stages by a number of Conquerors, of whom Mahavira was the 24th. Living as an ascetic, Mahavira preached the need for rigorous penance and self-denial as the means of perfecting human nature, escaping the cycle of rebirth, and attaining moksha, or liberation. Jains view karma as an invisible material substance that interferes with liberation and can be dissolved only through asceticism. By the end of the 1st century CE the Jains had split into two sects, each of which later developed its own canon of sacred writings: the Digambaras, who held that an adherent should own nothing, not even clothes, and that women must be reborn as men before they can attain moksha; and the more moderate Svetambaras, who retained a few possessions such as a robe, an alms bowl, a whisk broom, and a mukhavastrika (a piece of cloth held over the mouth to protect against the ingestion and killing of small insects). In keeping with their principle of reverence for life, Jains are known for their charitable works, including building shelters for animals. Jainism preaches universal tolerance and does not seek to make converts. In the early 21st century Jainism had some 5 million followers.