Johnson brings the gentleman-scientist and his times brilliantly into focus. From Darwin's birth into great fortune to his voyage aboard the Beagle, to the long-delayed publication of his masterpiece, Johnson delves into what made this Victorian gentleman into a visionary scientist--and into the tragic flaws that later led Darwin to support the burgeoning eugenics movement.

Francis Willughby lived and thrived in the midst of the rapidly accelerating scientific revolution of the seventeenth century. Traveling with his Cambridge tutor John Ray, they decided to overhaul the whole of natural history by imposing order on its messiness and complexity. It was exhilarating, exacting, and exhausting work. Yet before their first book, Ornithology , could be completed, Willughby died in 1672. Since then, Ray's reputation has grown,...