A totally egalitarian society is utopian. It cannot be completely made realistic.
For instance, if there was no 'coercive power', then how do you suppose that criminals or killers be treated. Should they be left alone? The act of punishment is a form of morality that the society is based upon. Its not perfect but surely keeps the society is check and stable.
Learning the History has been and still is very important in helping 'us' prepare for future events. So it cannot be totally ignored.