Reincarnation is the philosophical or religious concept that an aspect of a living being starts a new life in a different physical body or form after each biological death. It is also called rebirth or transmigration, and is a part of the Saṃsāra doctrine of cyclic existence. It is a central tenet of all major Indian religions, namely Jainism, Hinduism, Buddhism, and Sikhism. The idea of reincarnation is found in many ancient cultures and a belief in rebirth/metempsychosis was held by Greek historical figures, such as Pythagoras, Socrates, and Plato. It is also a common belief of various ancient and modern religions such as Spiritism, Theosophy, and Eckankar, and as an esoteric belief in many streams of Orthodox Judaism. It is found as well in many tribal societies around the world, in places such as Australia, East Asia, Siberia, and South America.
