India · c. 2nd c. BCE? (dates uncertain)
Kaṇāda
Founder of Vaiśeṣika, India’s classic atomism
He classified reality into categories—substance, quality, action, universal, particularity, inherence—and held that the material world is built from eternal, indivisible atoms.
Life and thought
Kaṇāda is the legendary founder of Vaiśeṣika, the school of “distinctions”. His name, often explained as “grain-eater” or “atom-eater”, already hints at its signature doctrine; nothing else reliable is known about him. Estimates for his life range from the 6th to the 2nd century BCE, and the Vaiśeṣika Sūtra attributed to him probably took its present form between 200 BCE and the start of the common era. Vaiśeṣika later merged with Nyāya into a single school.
The Sūtra sets out to list everything that exists under six categories: substance, quality, action, universal, particularity and inherence (a seventh, absence, was added later). Physical substances—earth, water, fire, air—are made of atoms. Vaiśeṣika authors argued that division must stop somewhere, or a mountain and a mustard seed would contain equally infinite parts. Atoms are eternal and partless; things arise when they combine and perish when they separate. This realist map of the world became the ontology most Indian logicians argued with.
Works
Shaped
c. 2nd c. BCE – 2nd c. CE (traditional author)Akṣapāda GautamaTraditional author of the Nyāya SūtraMeanwhile, in other traditions
c. 179–104 BCEDong ZhongshuHan scholar who helped make Confucianism the state learningOn the record
The Vaiśeṣika Sūtra is dated c. 150 BCE.
Kaṇāda’s century is unknown; estimates run from the 6th to the 2nd century BCE, with some scholars arguing for an early date because the Sūtra never mentions Buddhism. Matilal and Fowler place the text’s systematisation between 200 BCE and the start of the common era, which the atlas’s c. 150 BCE falls within; its doctrines may be older.
Sources: Wikipedia, “Kaṇāda” (citing Matilal 1977, Fowler 2002, Riepe 1961)