Rebirth is the doctrine Western readers most often quietly set aside, and the one that most of the tradition treats as foundational. It is also genuinely difficult — not because it is implausible, though many find it so, but because Buddhism holds it alongside the denial that there is anyone to be reborn.

Rebirth is not reincarnation #

The distinction is technical and it matters.

Reincarnation, in the sense the word usually carries, means that a soul — a permanent, unchanging individual essence — leaves one body and enters another. The soul is the thing that persists; bodies are what it wears. This is broadly the Hindu atman picture.

Rebirth, in Buddhism, has no such entity. Anatta denies precisely this. There is no soul, no essence, and nothing that travels.

What happens instead is that a process continues. The final moment of consciousness in one life conditions the arising of the first moment in the next, as any moment conditions the next moment. Nothing crosses the gap; the causal series propagates across it.

The Pali term is punabbhava, “again-becoming,” and the absence of a subject in the word is deliberate.

The analogies #

The tradition reaches for the same images repeatedly, and they are worth having.

The flame. A flame is passed from one candle to another. Is the second flame the same flame? No. A different one? Also no — it is causally dependent on the first and would not exist without it. Nothing material passed between them.

The seal and the wax. The seal leaves an impression; nothing of the seal is in the wax. The impression is fully determined by the seal and is not the seal.

The billiard balls. A modern addition: momentum is transferred, nothing material moves from one to the other.

One life, already. The most useful of all. You are conventionally the same person you were at five, and not a single constituent has survived — not the cells, not the beliefs, not the body, not the memories in any unchanged form. Whatever relation makes that “the same person” is the relation rebirth extends across a further discontinuity.

The Milindapanha’s formulation, when King Menander presses Nagasena on whether the reborn being is the same or different: na ca so na ca añño — neither he nor another.

Samsara #

Samsara means “wandering on” or “faring on.” It is the beginningless circulation of beings through the six realms, driven by craving and conditioned by karma.

Three features define it.

It is beginningless. The Buddha repeatedly says that no first point of samsara is discernible, and declines to speculate about one. There is no creation and no fall.

Its scale is overwhelming. The Samyutta Nikaya contains a series of similes on this. The tears shed over the deaths of loved ones across the wandering-on are greater than the water in the four great oceans. The bones left by one being’s successive bodies, if gathered and not destroyed, would be a mountain. The point is not statistical but affective: the duration is long enough that nothing within it should be taken as an achievement.

It is unsatisfactory throughout. Including the heavens, which end. There is no destination inside samsara worth arriving at, which is the argument for seeking the exit.

The process of rebirth #

Traditions describe the transition differently.

Theravada holds that rebirth is immediate. The last moment of consciousness in one life (cuti-citta, death-consciousness) is directly followed by the rebirth-linking consciousness (patisandhi-citta) in the next, with no interval. What conditions the rebirth is the state of mind at death, which is in turn conditioned by the karma that presents itself then — a weighty deed, a habitual pattern, something done near death, or a random past act, in that order of priority.

This is why deathbed practice matters so much in Theravada countries, and why monks are invited to chant for the dying. See Caring for the Dying.

Most other schools, including the Sarvastivada and all the Tibetan traditions, posit an intermediate state (antarabhava, Tibetan bardo) lasting up to forty-nine days, during which the being seeks a new rebirth. The Tibetan literature on this is extensive and is the basis of the Bardo Thodol, the so-called Tibetan Book of the Dead. See The Bardo.

The disagreement is old and was one of the substantive differences between the early schools.

What conditions the next life #

Karma, but not as a simple sum.

The realm is determined by the generative karma that ripens at death; the circumstances within it by supportive, obstructive, and destructive karma. The tradition’s causal story runs through dependent origination: ignorance conditions formations, formations condition consciousness, and the chain carries across the boundary between lives — which is how the traditional three-lifetime reading of the twelve links works.

What is not claimed is predictability. Tracing the specific karmic cause of a specific rebirth is one of the four “unconjecturable” things.

The evidence question #

Modern Buddhists ask whether there is evidence, and it is worth answering plainly.

The tradition’s own claim is experiential: that the recollection of past lives is an attainment available to highly developed practitioners, and that it was the first of the three knowledges on the night of the awakening. This is not evidence in the sense a sceptic would accept, and is not offered as such.

Outside the tradition, the most-cited research is Ian Stevenson’s, at the University of Virginia, which documented several thousand cases of young children reporting apparent memories of previous lives, some with details said to be verifiable. The work is taken seriously by some researchers and rejected by most, on grounds of methodology, the difficulty of excluding ordinary transmission of information, and cultural clustering of cases. Bhikkhu Analayo’s Rebirth in Early Buddhism and Current Research surveys it sympathetically and carefully.

An honest summary: there is no evidence that would persuade a committed sceptic, the question is not settled by anything currently available, and the tradition has never rested the doctrine on empirical demonstration.

The modern argument #

A substantial number of contemporary Buddhists practise without accepting literal rebirth, and the disagreement about whether this is legitimate is one of the liveliest in modern Buddhism.

The case for setting it aside, argued most prominently by Stephen Batchelor: rebirth was the common background assumption of the Buddha’s entire culture, shared by his opponents, and is therefore not his distinctive contribution. The Four Noble Truths can be stated and practised without it. The Kalama Sutta’s “four assurances” explicitly offer a version of the practice that holds good whether or not there is an afterlife. And the doctrine has been used to justify serious social harm.

The case against, argued by Bhikkhu Bodhi, Thanissaro Bhikkhu, and Analayo among others: rebirth is not background but foreground. “Birth is destroyed” is the standard formula for liberation, and it means the end of rebirth, not a psychological state. Right view, the first factor of the path, is defined in MN 117 in terms that explicitly include “there is this world and the next world.” The cosmology is not detachable decoration. And without rebirth the motivation structure of the path changes fundamentally: the urgency of the tradition depends on the stakes being what it says they are.

Both positions are held by serious practitioners and scholars. What is not defensible is the claim that the question is open within the tradition: every historical Buddhist school has held rebirth to be literally the case, and a practitioner who sets it aside is doing something new — which may be fine, and is worth knowing.

What it is for #

Whatever position a reader takes, it helps to see what work the doctrine does.

It makes the problem large enough to warrant the solution. A path requiring decades of disciplined effort is hard to motivate if the alternative is seventy uneventful years followed by nothing. It is easier to motivate against beginningless wandering.

It universalises compassion. The reflection that every being has, across beginningless time, been one’s mother is a standard method for generating bodhicitta, and it depends entirely on the doctrine.

It removes the specialness of this life without making it unimportant. This life is one of an immense number, and it is also the rare precious human rebirth in which something can be done.

Common questions #

What is reborn if there is no self? Nothing. A process continues. The question assumes a thing that must either persist or not, and the doctrine denies there is such a thing at any moment, including this one.

Can I be reborn as an animal? Yes, on the traditional account, and the texts treat it as a real and common prospect rather than a remote one.

Do Buddhists believe in past-life regression? The tradition holds that recollection of past lives is possible for developed practitioners as a fruit of deep concentration. Commercial hypnotic regression has no standing in any Buddhist tradition.

Does everyone eventually get liberated? Theravada makes no such guarantee; samsara is beginningless and may be endless for any given continuum. Some Mahayana traditions, on the basis of buddha-nature, hold that all beings will eventually awaken.

If I do not believe in rebirth, can I still practise? Plainly yes, and many do. It changes what the practice is for, and it is worth being clear-eyed about that rather than assuming the tradition agrees.

Sources & further reading #

Bhikkhu Analayo, Rebirth in Early Buddhism and Current Research (Wisdom, 2018) — the most careful treatment of both the textual and the empirical questions. Bhikkhu Bodhi, “Does Rebirth Make Sense?” (Buddhist Publication Society Newsletter, 2005) — the traditionalist case, briefly. Stephen Batchelor, Buddhism Without Beliefs (Riverhead, 1997) and Confession of a Buddhist Atheist (2010) — the case for setting it aside. Bhikkhu Pesala (ed.), The Debate of King Milinda (Motilal Banarsidass, 1991) — the classic treatment of continuity without identity. Peter Harvey, An Introduction to Buddhism (Cambridge, 2nd ed. 2013), pp. 32–46.