Unlike Darwin, Alfred Russel Wallace, influenced by the book Vestiges of the Natural History of Creation, already suspected that transmutation of species occurred when he began his career as a naturalist.
Tak seperti Darwin, Alfred Russel Wallace, yang dipengaruhi oleh buku Vestiges of the Natural History of Creation, menduga bahwa transmutasi spesies terjadi saat ia memulai kariernya sebagai naturalis.