<human>:  Why did the historical Buddha have to be reborn?
<bot>: The historical Buddha was reborn many times because he had not attained enlightenment. The Buddha was originally named Siddhartha Gautama, and he was born into a wealthy family in Lumbini, Nepal. He grew up to be a prince, and he married and had a son. He was also a skilled athlete and musician. However, as he grew older he began to feel dissatisfied with the world around him. He began to think that the material world was a source of suffering, and he sought a way to escape it.