By any objective measure, the evolution of species ranks among the most successful scientific theories ever. So why is the message not getting through? Charles Darwin liked to describe the origin of species as "one long argument," but his extensive treatise in support of biological evolution now seems painfully brief compared to the argument that has followed in its wake. Indeed, never in the history of science has a more prolonged and passionate debate dogged the heels of a theory so thoroughly researched and repeatedly validated. And the end is nowhere in sight. Despite all evidence to the contrary, a...