Buddhism originated in India in the 5th century BC with Siddhartha Gautama, who achieved enlightenment and insight into suffering under the Bodhi tree. His teachings of the four noble truths and the eightfold path spread from India to other parts of Asia between the 1st-6th centuries AD through trade. Buddhism remains most prominent in East Asian countries like China, Korea and Japan, though it is now a global religion with over 488 million followers worldwide. The core Buddhist philosophy teaches that life involves suffering which can be overcome through enlightenment and following the eightfold path of right view, speech, action, livelihood, effort, mindfulness and concentration.