Example Sentences

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Through the heated polemics of the more ardent selectionists Wagner's theory came to grow into an alternative instead of a help to the theory of selectional evolution.

From Darwin and Modern Science by Seward, A. C. (Albert Charles)

Haacke himself believes, however, that the race originated either in China or Japan as the result of systematic selectional breeding.

From The Dancing Mouse A Study in Animal Behavior by Yerkes, Robert M.

In these cases, however, the selectional effect was only against the personal enemies of the powerful, and was not a societal effect at all.

From Folkways A Study of the Sociological Importance of Usages, Manners, Customs, Mores, and Morals by Sumner, William Graham