Charles Darwin called on a broad and unusually powerful combination of critical thinking skills to create his wide-ranging explanation for biological change, On the Origin of Species. It's one of those rare books that takes a huge problem - the enormous diversity of different species - and seeks to use a vast range of evidence to solve it. But it was perhaps Darwin's towering creative prowess that made the most telling contribution to this masterpiece, for it was this that enabled him to make the necessary fresh connections between so much disparate evidence from such a diversity of...