[218] Karl Groos, The Play of Man, p. 213. (New York, 1901.)
[219] Supra, p. 50.
[220] The Dial, LXVII (Oct. 4, 1919), 297.
CHAPTER X
ACCOMMODATION
I. INTRODUCTION
1. Adaptation and Accommodation
The term adaptation came into vogue with Darwin's theory of the origin of the species by natural selection. This theory was based upon the observation that no two members of a biological species or of a family are ever exactly alike. Everywhere there is variation and individuality. Darwin's theory assumed this variation and explained the species as the result of natural selection. The individuals best fitted to live under the conditions of life which the environment offered, survived and produced the existing species. The others perished and the species which they represented disappeared. The differences in the species were explained as the result of the accumulation and perpetuation of the individual variations which had "survival value." Adaptations were the variations which had been in this way selected and transmitted.