New Yorker staff writer Adam Gopnik and Harvard psychology professor Steven Pinker debate the relevance of Darwin in our times, as well as his role in explaining why we are the way we are. Gopnik's Angels and Ages (published in January) compares the great evolutionist with the equally revolutionary President Lincoln, who was born on the same day in 1809. Pinker's latest book, The Stuff of Thought, analyzes language as the "window into human nature." Approaching the subject from different ends, historical and linguistic, both authors share their visions of Darwin's legacy on the 200th anniversary of his birth.