Was Charles Darwin a one-hit wonder? According to scientists who take a gene’s-eye view of evolution, the 19th-century English naturalist contributed one crucial idea to understanding how species change: natural selection, or “design without a designer”.
However, a book of Darwin’s that is little read by modern evolutionists – The Expression of the Emotions in Man and Animals – turns out to contain valuable lessons for scientists seeking to understand how and why humans do what we do.
