Wallace, Alfred Russel (1823-1913) - A largely self-educated English
naturalist and philosopher who developed a theory of evolution by natural
selection independently of and concurrently with Charles Darwin.
On the Law Which Has Regulated the Introduction of New Species (1855) -
Published before any of Darwin's theories were made public, this paper
states Wallace's theory, "every species has come into existence coincident
both in time and space with a pre-existing closely allied species."
