Sunyata

Nagarjuna's Mulamadhyamakakarika, the foundational text of the Madhyamaka school, proceeds by systematically examining candidate foundations for inherent existence, motion, causation, the self, time, even the Buddha and nirvana themselves, and argues in each case that the concept collapses into incoherence if taken to name something with a fixed, independent nature, while making perfect functional sense once understood as empty and dependently originated. His most famous formulation identifies emptiness directly with dependent origination: to say a thing is empty of inherent existence is not to say it does not exist at all, but to say that its existence is entirely a matter of dependence on causes, conditions, and conceptual imputation, never self-standing. This is crucial to how Madhyamaka avoids the charge of nihilism, a charge pressed against it from its earliest reception onward: emptiness is explicitly not nothingness, since conventional, functional existence, tables, persons, suffering, the path out of suffering, is fully affirmed; what is denied is only the further claim that any of these things possesses a fixed essence existing independently of causes and designation. Nagarjuna's method, the tetralemma, examining and rejecting four possible positions on any question, existence, non-existence, both, and neither, was itself designed to dissolve the attachment to fixed views rather than to install a new metaphysical thesis in their place.

Sunyata is not a peripheral Buddhist idea but arguably the central technical commitment separating Madhyamaka from other Buddhist schools and from every non-Buddhist system that posits a fixed underlying reality, which is precisely why it draws fire from more directions than almost any other position in this atlas. Essentialist and realist philosophies in the Western tradition, which hold that natural kinds have real defining essences, reject emptiness as incoherent, arguing that dependent origination itself, the process by which things arise, presupposes something that does the arising with a stable identity across the process. Vedantic monists press a different objection, arguing that Madhyamaka's total rejection of any fixed ground, even a non-dual Brahman, leaves it unable to explain what, if anything, is finally liberated, a criticism Madhyamaka answers by denying that liberation requires positing any such fixed ground at all.

Within Buddhism itself, Yogacara philosophers, while accepting emptiness, argued Madhyamaka's presentation left the status of consciousness itself dangerously underspecified, prompting centuries of internal debate over how radically the doctrine of no-self, anatta, should be pushed once emptiness is taken all the way down.