Today political science is often said to be ‘descriptive’ or ‘empirical,’ concerned with facts; political philosophy is called ‘normative’ because it… - Harvey Mansfield

Science wants the fruits of science, and it does not tolerate much doubt about the goodness of those fruits. ... Scientists had a bad conscience about making the atom bomb, it’s fair to say, but their doubts were not prompted, still less endorsed by their science.

The way out from complication and doubt is to reduce the good to pleasure, something close to the body, or to utility, something useful to the body. ... The body is considered as a factor all human beings have in common, hence an easy basis for generalization.

The simplified notion of self-interest used by our political and social science cannot tolerate the tension between one’s own and the good, for that tension leaves human behavior unpredictable. One cannot penetrate into every individual’s private thoughts, and there is no clear way to judge among different conceptions of the good. So in order to overcome the tension, science tries to combine one’s own and the good in such a way as to preserve neither. It generalizes one’s own as the interest of an average or, better to say, predictable individual who lives his life quantifiably so as to make its study easier for the social scientist. And for the same purpose it vulgarizes the good by eliminating the high and the mighty in our souls (not to mention the low and vicious), transforming our aspiration to nobility and truth into personal preferences of whose value science is incognizant, to which it is indifferent.