BuddhismReligion and philosophy founded in India c.525 B.C. by Siddhartha Gautama, called the Buddha. There are over 300 million Buddhists worldwide. One of the great world religions, it is divided into two main schools: the Theravada or Hinayana in Sri Lanka and SE Asia, and the Mahayana in China, Mongolia, Korea, and Japan. A third school, the Vajrayana, has a long tradition in Tibet and Japan. The basic doctrines of early Buddhism include the "four noble truths": existence is suffering (dukhka); suffering has a cause, namely craving and attachment (trishna); there is a cessation of suffering, which is nirvana; and there is a path to the cessation of suffering.