Abstract
Allen Buchanan argues that it doesn’t matter whether a state has authority in the sense of being able to create binding obligations for its citizens, so long as it is morally justified in wielding political power. In this paper, I look at this issue from a slightly different angle. I argue that it matters a great deal whether citizens relate to their state in an obligatory fashion. This is for two reasons. First, a fully morally justified state must be an efficacious state; it must be able to realise its values and make its rules stick. My contention will be that enduring stability can only be secured when citizens, or at least a significant proportion of citizens, are tangibly bound to regulate their conduct in accordance with a principle of obedience to just states. Second, it is only when individuals interact in the right way with the justification for state power that the state itself as a pervasive and coercive entity does not pose a problem for them as reason-responsive agents. In fac..