While he didn't exactly invent science, Francis Bacon is its best-known early promoter. The Advancement of Learning is his 1605 argument in favor of natural philosophy and inductive reasoning, and it is still vigorous and cogent today. Though using the language of Shakespeare, the book remains largely accessible to modern readers--still, a bit of classical knowledge is helpful. Shaking off the centuries-old domination of Aristotle, Bacon advocated building scientific theories on facts and observations rather than pure reason; little has changed in our approach to understanding the world since then. Of greatest interest to historians and philosophers of science, the book will also appeal to those curious about the underpinnings of today's naturalistic thinking.