Darwinism (1889)
 An exposition of the theory of natural selection, with some of its applications

by Alfred Russel Wallace

"Darwinism (1889)" by Alfred Russel Wallace is a book published in 1889. Written as a defense against critics of natural selection, this work presents Wallace's understanding of evolution across fifteen chapters. From defining species and explaining the struggle for existence to examining animal coloration, mimicry, and geographical distribution, Wallace builds a comprehensive case for natural selection. Notably, he rejects Darwin's sexual selection theory and advocates for what contemporaries called "pure Darwinism," emphasizing natural selection's primary role in evolution.