This article explores the influence of evolutionary ideas, especially Social Darwinism, on G. Stanley Hall's (1844-1924) educational ideas and major writings on gender and race. Hall formed these progressive ideas as he developed an American Social Darwinist pedagogy, embedded in his efforts to create the discipline of psychology, the science of education, and the study of educational psychology. They held a critical place in the development of twentieth-century American disciplinary knowledge and professional academic associations. (Contains 188 footnotes.)