Belief in reincarnation is an ancient phenomenon. This doctrine is a central tenet within the majority of Indian religious traditions, such as Hinduism (including Yoga, Vaishnavism, and Shaivism), Jainism, and Sikhism. The idea was also entertained by some ancient Greek philosophers. Many modern Pagans also believe in reincarnation as do some New Age movements, along with followers of Spiritism, practitioners of certain African traditions, and students of esoteric philosophies such as Kabbalah, Sufism and Gnostic and Esoteric Christianity. The Buddhist concept of Rebirth although often referred to as reincarnation differs significantly from the Hindu-based traditions and New Age movements in that there is no "self" (or eternal soul) to reincarnate.

During recent decades, a significant minority of people in the West have developed a belief in reincarnation. Feature films, such as Kundun and Birth, contemporary books by authors such as Carol Bowman and Vicki Mackenzie, as well as popular songs, regularly mention reincarnation.

Some researchers, such as Professor Ian Stevenson, have explored the issue of reincarnation and published evidence of children's memories of earlier lives. Skeptics are critical of this work and say that more reincarnation research is needed.

Eastern religions and traditions

Eastern philosophical and religious beliefs regarding the existence or non-existence of an enduring 'self' have a direct bearing on how reincarnation is viewed within a given tradition. There are large differences in philosophical beliefs regarding the nature of the soul (also known as the jiva or atman) amongst Eastern religions such as Hinduism and Buddhism. Some schools deny the existence of a 'self', while others claim the existence of an eternal, personal self, and still others say there is neither 'self' nor 'no-self', as both are false. Each of these beliefs has a direct bearing on the possible nature of reincarnation, including such concepts as samsara, moksha, nirvana, and bhakti.

Buddhism

Main: Rebirth (Buddhism)

According to the scriptures, the Buddha taught a concept of rebirth that was distinct from that of any known contemporary Indian teacher. This concept was consistent with the common notion of a sequence of related lives stretching over a very long time, but was constrained by two core Buddhist concepts: anattā, that there is no irreducible ātman or "self" tying these lives together; and anicca, that all compounded things are subject to dissolution, including all the components of the human person and personality. At the death of one personality, a new one comes into being, much as the flame of a dying candle can serve to light the flame of another.