Buddhism is a 2500-year-old tradition rooted in the teachings of Siddhartha Gautama (the Buddha) that emphasizes the 'middle way of wisdom and compassion.' The core tenets include the Four Noble Truths and the Eightfold Path, guiding followers towards achieving nirvana and escaping the cycle of rebirth. Buddhism has diversified into various schools, such as Theravada, Mahayana, and Vajrayana, and has gained recognition in the West over the past two centuries.