“Pluralism, with the measure of ‘negative” liberty that it entails, seems to me a truer and more humane ideal than the goals of those who seek in the great disciplined, authoritarian structures the ideal of “positive” self-mastery by classes, or peoples, or the whole of mankind. It is truer, because it does, at least, recognise the fact that human goals are many, not all of them commensurable, and in perpetual rivalry with one another.”
Research and Teaching 