Buddhism originated in India in the 5th century BCE when Siddhartha Gautama achieved enlightenment and insight into suffering under the Bodhi tree. He taught that devotion, meditation, and moral practices like non-violence could help end suffering and reach nirvana. Central to Buddhism are the Four Noble Truths about dukkha and the Eightfold Path to its cessation. Buddhism spread from India and has over 350 million followers worldwide today in various traditions.