The Origin of the Species profoundly shocked Victorian readers by calling into question the belief in a Creator with its description of evolution through natural selection. And Darwin’s seminal work is nearly as controversial today. In her illuminating study, Browne delves into the long genesis of Darwin’s theories, from his readings as a university student and his five-year voyage on the Beagle, to his debates with contemporaries and experiments in his garden. She explores the shock to Darwin when he read of competing scientist’s similar discoveries and the wide and immediate impact of Darwin’s theories on the world.