No one has ever proved that a human being, through his descent from a certain group of people, must of necessity have certain mental characteristics. - Franz Boas

It is obvious, therefore, that attempts to classify mankind, based on the present distribution of type, language and culture, must lead to different results, according to the point of view taken; that a classification based primarily on type alone will lead to a system which represents more or less accurately the blood- relationships of the people; but these do not need to coincide with their cultural relationships. In the same way classifications based on language and culture do not need to coincide with a biological classification.

Eugenics should, therefore, not be allowed to deceive us into the belief that we should try to raise a race of supermen, nor that it should be our aim to eliminate all suffering and pain. The attempt to suppress those defective classes whose deficiencies can be proved by rigid methods to be due to hereditary causes, and to prevent unions that will unavoidably lead to the birth of disease-stricken progeny, is the proper field of eugenics. How much can be and should be attempted in this field depends upon the results of careful studies of the law of heredity. Eugenics is not a panacea that will cure human ills, it is rather a dangerous sword that may turn its edge against those who rely on its strength.

The passion for seeking the truth for truth's sake...can be kept alive only if we continue to seek the truth for truth's sake.