By summer 1858, Darwin had written a quarter of a million words on evolution – and published none. Then a letter compelled him to go public. Alfred Russel Wallace was an admirer of Darwin's.

A medal was presented to Dr. Alfred Russel Wallace, co-discoverer of the Darwinian ... of the reading of the joint paper in which Darwin and he first gave expression to their views.

Most famously, he had the revolutionary idea of evolution by natural selection ... and over 1,000 articles and published letters. See this commemorative portrait of Wallace, which hangs beside the ...

Always trying to take all the credit for our joint theory of evolution ... I received your letter backing up my theories. ALFRED WALLACE: Our theories you mean! CHARLES DARWIN: Well, that's ...

Alfred Russel Wallace was a British naturalist renowned for co-developing the theory of evolution alongside Charles Darwin—and for mapping out the biodiversity of the Indonesian Archipelago.

If Darwin hadn’t discovered evolution by natural selection, someone else would have. In fact, Alfred Russel Wallace drew on observations from the Malay Archipelago to come to the same realization.