1684 "The New Division of the Earth According to the different Types or Races of Men Who Inhabit It" by François Bernier

1735 "Systema Naturae" by Carl Linnaeus

1749 "Of the Varieties of the Human Species" by Georges-Louis Leclerc Comte de Buffon 

1775 (rewritten in 1781, 1795) "On the Natural Variety of Mankind" by Johann Friedrich Blumenbach 

1839 "Crania Americana; or, A Comparative View of the Skulls of Various Aboriginal Nations of North and South America: To which is Prefixed An Essay on the Varieties of the Human Species" by Samuel Morton 

1848 "The Natural History of the Human Species" by Charles Smith

1861 "On the Origin of Species by Means of Natural Selection, or the Preservation of Favored Races in the Struggle for Life" by Charles Darwin

1864 "Principles of Biology" by Herbert Spencer

1871 "The Descent of Man" by Charles Darwin

1871 "The Primitive Culture" by Edward Taylor 

1899 "The Philadelphia Negro: a Social Study" by W. E. B. Du Bois