Buddhism originates with Siddhārtha Gautama in the context of northern Indian śramaṇa movements, articulating a path centered on awakening, ethics, meditation, and insight in response to the problem of dukkha rather than political crisis. From its earliest formation, Buddhism stabilizes around the sangha, vinaya discipline, and a preserved teaching corpus, developing clear identity boundaries through ordination lineage and monastic continuity rather than creed.

Buddhism expands through monastic networks, merchant patronage, and trade routes, with royal support—especially under Aśoka—accelerating institutional consolidation. Over time it differentiates into multiple traditions through layered diversification rather than a single schism, including early schools, Mahāyāna, and later Vajrayāna developments, with authority increasingly grounded in texts, lineages, and practice efficacy. In the modern era, Buddhism adapts through reform movements, global transmission, and diaspora institutions, persisting today across distinct regional families with varying forms of monastic, lay, and transnational expression.

1. Origin Moment

2. Formation Period

3. Expansion and Consolidation

4. Reformation and Schism

5. Derivative Traditions and Successor Movements

6. Modern Encounters

7. Contemporary Situation