One Long Argument: Charles Darwin and the Genesis of Modern Evolutionary Thought by Ernst Mayr
Darwin's theory of evolution has remained the object of continual debate and controversy throughout the last 140 years. In fact Darwin himself described his challenge to the orthodoxies of his day as "one long argument". In this book, Ernst Mayr traces the history of Darwin's evolutionary theories, emphasizing the extraordinary originality of Darwin's genius, and his skills as a naturalist, biologist and philosopher.