CHARLES DARWIN 



CharlesDarwin (b.1809; d. 1882) for twenty-two years collected data upon problems 

 of competition, variation, survival, and heredity ; then (1858), together with A. R. 

 Wallace (b. 1822; d. 1913), presented his essay, "Origin of Species, or Preserva- 

 tion of Favored Races in the Struggle for Life"; published his epoch-making 

 book, " On the Origin of Species," in 1859, and afterwards published many vol- 

 umes containing a great mass of data bearing upon the evolution of plants and 

 animals. Darwin was an unsurpassed investigator ; his rule of observing without 

 prejudice and of adopting no conclusion except on a basis of observed facts, his 

 fearlessness in following truth, his revulsion at known error, furnished an invalu- 

 able contribution toward the scientific method of study in biology 



