Aristotle in his book Politics teach about the organization of man in community. Aristotle states: "political regime is an organization of the city, of its magistracies and especially of the one that has authority over all" Chapter 6 Book 3. Then he affirms: "all regimes that look at the common good are correct..., and that those who attend only to the particular of the rulers are erroneous and all of them are deviations from the righteous regime, because they are despotic and the city is the community of free men "C 6 L 3.
Aristotle enumerates the correct forms: monarchy, the government of only one; Aristocracy the government of few but more than one; and republic the government of the majority. The corresponding deviations are: tyranny, oligarchy and democracy. Aristotle enumerates and describes with its own problems the different forms of organization of a city (political), but he does not describe how the ethical or righteous regime arise and is manteined, wich is the true end of the science about the social life and the organization of the human community , the politics.
Jesus explains to us in the Parable of the Good Samaritan that we sin or live righteously. The rectitude is always acting by ethical principles: "do for others what you would like them to do for you", Matthew 7:12. When the rectitude of men is imposed, the social rectitude generates a form of ethical community organization: the communion or life in common.
The communion is like God desires men to live, communion is the empire of righteousness among men, communion is life in common because everything attends to concord (union of hearts) and to the common good, this is the only regime truly ethical either of one, of a few or of the majority. Such is the importance of the communion that is a sacrament within the Christian religion.
When men cease to be "precise and exact," that is, they abandon ethics, and practice the error, cultivating only the private interests and seeking the false goods, we never know when an evil may arrive and ravage and destroys the community; summarizing the problem of the error and the search of the false goods in a community Aristotle concludes:
"From the false goods will ever come a true evil", Book IV, C XII, Book Politics, Aristotle.