[[St. George Jackson Mivart|St. George Jackson Mivart's]] ''On the Genesis of Species'' (1872) and [[Edward Drinker Cope|Edward Cope]]'s ''Origin of the Fittest'' (1887) raised the need to address the origin of variation between members of a species. [[William Bateson]] in 1884 distinguished between the origin of novel variations and the action of natural selection (''Materials for the Study of Variation Treated with Especial Regard to Discontinuity in the Origin of Species'').<ref name=Reid /> | [[St. George Jackson Mivart|St. George Jackson Mivart's]] ''On the Genesis of Species'' (1872) and [[Edward Drinker Cope|Edward Cope]]'s ''Origin of the Fittest'' (1887) raised the need to address the origin of variation between members of a species. [[William Bateson]] in 1884 distinguished between the origin of novel variations and the action of natural selection (''Materials for the Study of Variation Treated with Especial Regard to Discontinuity in the Origin of Species'').<ref name=Reid /> |