The theory was developed independently by Charles Darwin and Alfred Russel Wallace.
Charles Darwin and Alfred Russel Wallace
The developers of the theory of evolution by natural selection were Charles Robert Darwin and Alfred Russel Wallace.
Both Charles Robert Darwin and Alfred Russel Wallace are responsible for this theory that hangs all of biology together.
Charles Robert Darwin and Alfred Russel Wallace.
Charles Darwin developed the theory through his observations at the Galapagos Islands.
Alfred Russel Wallace. Google him.
Alfred Russel Wallace.
Charles Robert Darwin. Do not forget Alfred Russel Wallace.
Charles Robert Darwin and to a lesser extent, Alfred Russel Wallace.
Alfred Russel Wallace independently came up with the theory of evolution. His and Darwin's papers on evolution were jointly presented in 1858, and so both are credited with the discovery of evolution by natural selection.
That would be Charles Robert Darwin and Alfred Russel Wallace.