Locke intimates in the "First Treatise" that the doctrine of divine right of kings ("jure divino") will eventually be the downfall of all governments. In his final chapter he asks, "Who heir?" If Filmer is correct, there should be only one rightful king in all the world—the heir of Adam. But since it is impossible to discover the true heir of Adam, no government, under Filmer's principles, can require that its members obey its rulers. Filmer must therefore say that men are duty-bound to obey their present rulers. Locke writes: