Yoruba say of their culture that it is "like a river that never rests." The author has explored the depths of that cultural river, revealing in lucid analysis and preceptive interpretations certain foundational principles and generative ideas that have animated this dynamic culture, its philosophy of being and world-making, from 300 BCE to 1840 CE. His analysis is an exquisitely detailed and evocative portrait of the Yoruba "community of practice" that will change the ways we think about Yoruba history and culture and become a seminal source for present and future scholars.