Human biology and racial welfare (1930)
by Edmund Vincent Cowdry"Each one of us feels in his own experience an insistent urge to speciahze in order that he may do, not a variety of things, but a few things better and more quickly. He must swim with the stream or he will not survive. It is true in business as in science. In one way this concentration is good, and in another it is bad. It is good since it is the essence of progress which makes the world...
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