"The egalitarian doctrine is manifestly contrary to all the facts established by biology and by history. Only fanatical partisans of this theory can contend that what distinguishes the genius from the dullard is entirely the effect of postnatal influences."

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Heredity is to-day the central problem of biology. This problem may be approached from many sides - that of the breeder, the experimenter, the statistician, the physiologist, the embryologist, the cytologist - but the mechanism of heredity can be studied best by the investigation of the germ cells and their development.

— Edwin Conklin