The scientific observer of the realm of nature is in a sense naturally and inevitably disinterested. At least, nothing in the natural scene can arouse his bias. Furthermore, he stands completely outside of the natural so that his mind, whatever his limitations, approximates pure mind. The observer of the realm of history cannot be disinterested in the same way, for two reasons: first, he must look at history from some locus in history; secondly, he is to a certain degree engaged in its ideological conflicts.
Reinhold NiebuhrMarxism was the social creed and the social cry of those classes who knew by their miseries that the creed of the liberal optimists was s snare and a delusion... Liberalism and Marxism share a common illusion of the "children of light." Neither understands property as a form of power which can be used in either its individual or its social form as an instrument of particular interest against the general interest.
Reinhold Niebuhr