Darwin defined it as "preservation of favorable variations and the rejection of injurious variations"
[DOC] [TLE] Reconsidering the logical structure of the theory of natural selection [PAR] Oct 30, 2014 ... Natural selection should be defined as the theory that attempts to predict ... 
Darwin first described natural selection in The Origin of Species in a... [DOC] [TLE] This page compares Darwin and Wallace on the Origin of Species ... [PAR] Charles Darwin to Alfred Russel Wallace, Letter dated: April 29, 1867.