Buddhism in South and Southeast Asia traces its roots to ancient India, where Siddhartha Gautama attained enlightenment and began teaching. The Four Noble Truths and Eightfold Path form the core of Buddhist philosophy, emphasizing the cessation of suffering through ethical living and spiritual practice. As Buddhism spread, it adapted to local cultures, influencing art, architecture, and social structures. Theravada Buddhism became dominant in mainland Southeast Asia, while Mahayana and Vajrayana traditions flourished elsewhere. Today, Buddhism remains a vital force in the region, evolving to address modern challenges.