Siddhartha Gautama, also known as the Buddha, was a philosopher and spiritual teacher who lived sometime during the sixth and fifth centuries B.C. in India. He is credited with founding Buddhism — now the world's fourth largest religion with an estimated 500 million(opens in new tab) adherents — and teaching such concepts as enlightenment, nirvana and the "middle way."
The word "Buddha" is derived from the Sanskrit word budh and is generally translated as "one who is awake." To many Buddhists, the Buddha is a man who achieved spiritual enlightenment — a state of mind in which all traces of personal suffering have been extinguished and reality is viewed with an unfailing clarity.
The story of his life, however, does not form a single, unvarying narrative. There are many variations, and the stories of the Buddha's life and teachings form a vast compendium.