Buddhism is not a single uniform institution. Over centuries, communities preserved different canons, philosophical systems, rituals, and lineages. The three broad labels most often used today are Theravāda, East Asian Mahāyāna, and Indo-Tibetan or esoteric Vajrayāna. These are maps, not three internally identical churches. Each contains major differences. A historical overview of Buddhism can help place these living traditions without pretending they developed all at once.
Theravāda is the principal living tradition of Sri Lanka, Myanmar, Thailand, Cambodia, and Laos. Its canonical language is Pāli, and its central scriptures are the Tipiṭaka: Vinaya, Sutta, and Abhidhamma collections, together with commentaries and later works. It emphasizes the path to arahantship, though it honors the Buddha and future Buddha Metteyya and contains rich devotional, merit, protective chanting, meditation, and local traditions.
Mahāyāna developed in India and became dominant across China, Korea, Japan, and Vietnam. It accepts early Buddhist foundations while revering additional Mahāyāna sūtras and śāstras. The bodhisattva ideal—seeking complete Buddhahood for the welfare of all beings—is central. Emptiness, Buddha-nature, Pure Land devotion, Chan/Zen meditation, Tiantai, Huayan, Nichiren, and many other teachings belong to different Mahāyāna worlds and should not be collapsed together.
Vajrayāna consists of esoteric methods practiced within a Mahāyāna framework, especially in Tibetan and Himalayan Buddhism and Japanese Shingon. Mantra, mudrā, mandala, deity yoga, subtle-body systems, and initiation may be used under a qualified teacher. These methods are not safely or meaningfully reconstructed from a short online description; lineage transmission, vows, and preparation are integral.
Shared family resemblances include refuge in Buddha, Dhamma/Dharma, and Saṅgha; kamma and rebirth; ethical restraint; meditation; wisdom; compassion; liberation from saṃsāra; monastic lineages; and reverence for awakened beings. Differences in canon and doctrine are real. Respect does not require pretending every school says exactly the same thing, and historical study should avoid the derogatory use of Hīnayāna for contemporary Theravāda.
Cambodian Buddhism belongs to the Theravāda family and preserves Pāli liturgy, monastic Vinaya, merit-making, ancestor remembrance, meditation, protective chanting, and temple-centered community life. Historical disruption and renewal have also shaped how the tradition is lived today.
A Theravāda temple, a Chinese Pure Land temple, a Zen monastery, and a Tibetan center may chant in different languages, use different scriptures and images, and train through distinct methods while all understanding themselves as heirs to the Buddha's path.