It is, I think, a rather sad reflection on the present state of political science that our language does not distinguish between such key terms as power, strength, force, might, authority, and, finally, violence—all of which refer to distinct phenomena. To use them as synonyms not only indicates a certain deafness to linguistic meanings, which would be serious enough, but has resulted in a kind of blindness with respect to the realities they correspond to. Behind the apparent confusion lies a firm conviction that the most crucial political issue is, and always has been, the question of Who rules Whom? Only after one eliminates this disastrous reduction of public affairs to the business of dominion will the original data concerning human affairs appear or rather reappear in their authentic diversity.
Source
The New York Review of Books (February 27 1969).
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