What “birthplace” does and does not mean
Buddhism as a whole began in northeast India, in the Ganges plain, in the lifetime of the Buddha. Theravada, however, is a particular school, and as a distinct, named tradition it took shape later and mainly in Sri Lanka. So India is best understood as the source of Theravada’s teachings and canon, not as the single birthplace of the school as it is known today. Scholars and traditions describe the details differently, and this article keeps to the broadly agreed outline.
Early Indian Buddhism
In the centuries after the Buddha, his followers preserved the teachings orally and organised monastic life around a shared code of discipline. Buddhist tradition recounts a series of councils at which the teachings were recited and disputes addressed; historians treat the accounts with varying degrees of caution, and how the Buddhist councils are understood differs between traditions. Over time, communities developed differences over discipline and doctrine and separated into a number of early schools.
One of those early groups is commonly called the Sthaviras, “the elders”, and the word Theravada is the Pali form of a similar idea. Theravada communities regard themselves as heirs of this elders’ tradition, though scholars debate how directly the later school descends from any one early group.
Ashoka and the move to Sri Lanka
Tradition holds that the Mauryan emperor Ashoka, in the third century BCE, supported the Buddhist community and sent missions beyond his realm. One was traditionally led by his son or younger relative Mahinda to Sri Lanka, where the king was converted. The story of Emperor Ashoka and the spread of Buddhism is told in the Sri Lankan chronicles and also in Ashoka’s own inscriptions, though the two sources do not always agree on particulars.
In Sri Lanka the monastic community established centres, notably in Anuradhapura, and preserved the teachings in the Pali language. Sri Lankan sources say the canon was written down there, traditionally around the first century BCE. Later commentarial work, associated with the scholar Buddhaghosa around the fifth century CE, helped shape the Theravada outlook. The Pali Canon, as it is known now, is the main scripture of the school.
What happened to Theravada in India
The Theravada identity continued and flourished in Sri Lanka and later in Myanmar, Thailand, Cambodia and Laos, which is why the story of how Buddhism reached Southeast Asia matters. In India itself, Buddhism declined over many centuries, and by the later medieval period it had largely disappeared from most of the country, with the exception of some Himalayan areas. There is a modern revival in India, including the work of Theravada monks and lay organisations around Bodh Gaya and Sarnath in the late nineteenth and twentieth centuries.
Seeing this on the ground in India
Visitors to Indian sites often meet Theravada in the form of temples and monasteries built by Sri Lankan, Thai, Burmese and other communities, especially near Bodh Gaya, Sarnath and Kushinagar. These are modern foundations, set beside much older ruins. The ancient sites themselves, from the Bodhi tree to the stupas, belong to the shared heritage of all Buddhists rather than to one school.
The differences between the major Buddhist traditions are also worth keeping in mind. Practices vary by country and community: robes, chanting, offerings and festival customs are not identical. When in doubt, follow local guidance.
A reasonable summary
India supplied the Buddha, the early community and the basic teachings that Theravada preserves. Sri Lanka gave the school its distinct identity, its written canon in Pali and its long institutional continuity. Calling India the “birthplace” is understandable shorthand, but a more accurate phrase is that India is where Theravada’s roots lie.