Why Buddhism is not a single religion but a vast, branching family tree

Ideas & Philosophy · Published 3 October 2026 Swipe more like this →

In short: Buddhism is not a monolith, but a complex web of thousands of sects shaped by geography, history, and evolving interpretations. While core concepts like karma and rebirth remain consistent, the traditions diverge wildly in their scriptures, monastic laws, and ultimate goals, creating a tradition as diverse as it is ancient.

The branching of Buddhism began with the first schism, which most scholars believe was triggered by disagreements over monastic rules, or vinaya. This initial split divided the community into the Sthavira, or Elders, and the Mahāsāṃghika, or Great Community. This foundational division likely occurred after the time of Ashoka, setting the stage for the thousands of sects, sub-sects, and movements that have emerged over the centuries.

In Western academia, Buddhism is often categorized into three major branches: Theravāda, Mahāyāna, and Vajrayāna. Theravāda, the 'Teaching of the Elders,' is dominant in Sri Lanka and Southeast Asia and relies on the Pali Canon. East Asian Mahāyāna, or the 'Great Vehicle,' developed during the Han Dynasty and emphasizes Mahāyāna sutras preserved in classical Chinese. Vajrayāna, or 'Tantric Buddhism,' is prominent in Tibet, Bhutan, and parts of the Himalayan region, focusing on tantric materials and mantras.

Classifying these traditions is notoriously difficult because scholars often use geographic or philosophical criteria that differ from how practitioners identify themselves. Terms like Hīnayāna, once used to describe early schools, are now widely considered pejorative and controversial. Even the definition of Vajrayāna remains debated; one scholar noted that it is exceedingly difficult to identify exactly what sets it apart from other traditions. This complexity reflects the reality that Buddhism is not a singular, static entity, but a dynamic, evolving phenomenon that continues to adapt across cultures and time.

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