Samsara, Karma and Rebirth in Buddhism: IB Guide

Samsara, karma and rebirth in Buddhism explain the human problem, the process that sustains it, and the possibility of liberation. Understanding their relationship matters more than memorizing three definitions.

For IB World Religions SL, the essential relationship is this: beings remain within samsara, the recurring process of birth and death, because intentional actions called karma have consequences. Rebirth continues without an eternal soul passing unchanged between lives. The Buddhist path aims to end the ignorance and craving that keep this process going.

If Buddhism teaches anattā, or not-self, what is reborn? A strong answer explains continuity through dependent causation rather than through an unchanging identity.

The essential overview

Before studying the interpretations, secure this framework:

• Samsara: saṃsāra in Sanskrit and Pali, meaning wandering on through repeated birth, death and rebirth.
• Karma: karma in Sanskrit and kamma in Pali, meaning intentional action, especially action of body, speech and mind.
• Rebirth: punarbhava in Sanskrit or punabbhava in Pali, meaning renewed existence or becoming again.
• The cause: ignorance, craving and attachment sustain the cycle.
• The goal: nirvāṇa in Sanskrit or nibbāna in Pali, the extinguishing of the causes of suffering and rebirth.
• The puzzle: rebirth occurs without an eternal, independent self.

RevisionDojo’s notes on samsara, kamma and rebirth can help consolidate these relationships before you attempt comparative or evaluative questions.

Samsara is a condition, not simply a location

The word saṃsāra suggests wandering. It refers to conditioned existence marked by repeated birth and death, not merely to one unpleasant realm where beings are punished. Buddhist cosmologies describe heavenly, human, animal, hungry ghost and hell realms, although lists and interpretations vary among traditions. None provides permanent security. Even an exceptionally pleasant rebirth ends because all conditioned things are impermanent.

This connects samsara to the Three Marks of Existence. Conditioned existence is anicca or impermanent, dukkha or incapable of providing lasting satisfaction, and anattā or without an enduring self. Samsara is therefore not only a sequence of lives. It is also the recurring pattern through which beings grasp at changing experiences and treat them as sources of permanent identity or satisfaction.

In the Saṃyutta Nikāya 15.1, the Buddha describes samsara as having no discoverable beginning. The emphasis falls less on identifying a first cause than on understanding the causes operating now. RevisionDojo’s explanation of samsara, craving and dukkha develops that connection.

In an IB response, distinguish the terms: samsara names the entire conditioned cycle, while rebirth is the renewal of existence within it.

A student’s tangled string accompanies a question about the meaning of life.

Karma means intentional action

Karma is not simply the claim that good things happen to good people. Intention matters.

In the Nibbedhika Sutta of the Aṅguttara Nikāya 6.63, the Buddha identifies intention, cetanā, as karma. Intention expresses itself through body, speech and mind. An accidental movement and a deliberate act can therefore have different moral significance even when their outward results appear similar.

Wholesome actions rooted in generosity, compassion and wisdom tend toward beneficial consequences. Unwholesome actions rooted in greed, hatred and delusion tend toward suffering. The fruition of action is called vipāka, but Buddhist karma is not a cosmic judge assigning rewards. It is an impersonal pattern of moral causation.

Nor does the doctrine mean that every present difficulty was caused by an action in a former life. In the Sīvaka Sutta, Saṃmyutta Nikāya 36.21, the Buddha rejects the claim that every feeling is entirely produced by previous karma. The text recognizes bodily, environmental and other causes. This makes karma different from fatalism: present choices still matter, and suffering should not be used to blame its victims.

For concise terminology practice, students can pair the Buddhism study resources with Buddhism flashcards.

Rebirth without an eternal soul

Buddhist teaching rejects an eternal, independent ātman. A person is instead analysed through five aggregates, the skandhas in Sanskrit or khandhas in Pali: form, feeling, perception, mental formations and consciousness.

These aggregates change continuously. Yet change does not mean that actions leave no consequences. One mental and physical event conditions another, creating continuity without an unchanging substance underneath.

The later Buddhist text Milindapañha, or Questions of King Milinda, compares this continuity to one lamp lighting another flame. The flames are causally connected, but not numerically identical. Similarly, the reborn being is described as neither exactly the same person nor a completely unrelated person.

This is why rebirth is usually more precise than reincarnation in Buddhist contexts. Reincarnation can imply that a permanent soul enters a new body. Buddhist accounts generally describe a causal process in which consciousness, craving and karma condition renewed existence without an eternal self migrating between bodies.

Dependent origination, pratītyasamutpāda in Sanskrit and paṭiccasamuppāda in Pali, provides the conceptual structure. Ignorance conditions formations, formations condition consciousness, and the chain eventually includes craving, clinging, becoming, birth, ageing and death. Ending ignorance and craving interrupts the process rather than improving an immortal soul.

Theravada and Mahayana interpretations

Theravada emphasis

Theravada Buddhism gives particular authority to the Pali Canon. Its teachings commonly emphasize intentional kamma, cultivation of the Noble Eightfold Path, and attainment of nibbāna. The arahant ideal represents a person who has uprooted greed, hatred and delusion, bringing the production of karma leading to future rebirth to an end.

Merit, puñña, remains significant in lay practice. Generosity, ethical conduct and mental cultivation may support a favourable rebirth, but favourable rebirth is not identical to final liberation. It remains within samsara.

Mahayana emphasis

Mahayana traditions share the doctrines of karma and rebirth while placing special emphasis on the bodhisattva, one who seeks awakening for the benefit of all beings. The aspiration is not merely personal escape. Wisdom and compassion develop together, and merit may be dedicated to others.

Pure Land traditions offer another important interpretation. Devotion to Amitābha Buddha and aspiration for rebirth in Sukhāvatī, the Pure Land, are understood as creating exceptionally supportive conditions for progress toward awakening. Pure Land rebirth is therefore not the same as nirvana. It is a rebirth oriented toward liberation.

Some Mahayana philosophical texts also stress emptiness, śūnyatā. Karma operates conventionally, but neither the agent nor the action possesses an independent, permanent essence. This does not erase moral responsibility. It explains responsibility through interdependence rather than through a fixed self.

A balanced comparison recognizes shared teachings on conditioned existence, morally significant action, rebirth and liberation, without overlooking differences in language, practice and spiritual ideals.

The three fundamental questions

The IB framework asks students to connect details to three larger questions. RevisionDojo’s guide to the three fundamental questions provides a broader comparative foundation.

What is the human condition?

Human beings exist within samsara and experience dukkha because ignorance and craving distort how reality is understood. People cling to impermanent experiences and construct fixed identities from changing aggregates. Karma gives those intentional patterns consequences.

Where are we going?

Without liberation, karmically conditioned rebirth continues. A wholesome life may contribute to a favourable rebirth, but every conditioned realm remains impermanent. The ultimate destination is nirvana, while Mahayana traditions may articulate this through buddhahood or a bodhisattva path. The notes on rebirth, nibbana and buddhahood clarify these distinct goals.

How do we get there?

The answer is transformation through ethics, meditation and wisdom. The Noble Eightfold Path weakens the ignorance, craving and harmful intention that sustain samsara. Generosity, compassion, mindfulness and insight are therefore not isolated virtues. They reshape the causal process of existence.

Connecting the five IB themes

The best IB World Religions Buddhism answers move between doctrine and lived religion.

Connect the themes rather than listing them. Giving expresses ethical generosity, receives meaning through karmic doctrine, appears in textual traditions and may shape religious experience. Those intersections create analysis.

How to write about these concepts accurately

Define the terms, explain their causal relationship, support claims with a primary text, and acknowledge diversity. Avoid equating karma with fate, suffering with deserved punishment, or rebirth with an eternal soul’s migration.

Then make the connection explicit: ignorance and craving generate intentional patterns; these patterns have consequences; consequences contribute to renewed existence; the Buddhist path removes the causes that sustain the cycle.

RevisionDojo is built to turn that understanding into exam-ready control. Its Questionbank and Grading tools help students test explanations, while Study Notes, Flashcards and AI Chat expose missing links between concepts. Predicted Papers and Mock Exams support timed practice, and the Coursework Library and Tutors provide guidance when comparison or evaluation needs greater precision. Used together, these resources make RevisionDojo the ultimate IB resource for moving from memorized vocabulary to disciplined religious analysis.