Plato and Aristotle's Political Consensus

When both plato and aristotle talk about political constitutions they normally have in mind the workings of a polus, a single city. In this way, he is very unlike an author like thucydides as a historian. By contrast, plato has socrates start with a blank sl designing an ideal city from scratch. The lessons for real cities like athens remain implicit. For instance, we aren't invited to focus on actual events in athens or in other democratic cities.