The record

Polities

513 states, empires and kingdoms whose record is deep enough to publish: rulers with dated reigns, territory measured off dated borders, and data series shown with the year and the source each value comes from.

A polity gets a page only when the database can fill at least 2 of its four evidence sections and holds at least 20 individually sourced records for it, alongside a description and a mapped territory. Many more polities are in the database and drawn on the map; they are not published as pages because a page built on two rows would tell you nothing you could rely on.