For political realists, legitimacy is a central requirement for the desirability of political institutions. Their detractors contend that it is either descriptive, and thus devoid of critical potential, or it relies on some moralist value that realists reject. We defend a functionalist reading of realist legitimacy: descriptive legitimacy, that is, the capacity of a political institution to generate beliefs in its right to rule as opposed to commanding through coercion alone, is desirable in virtue of its functional role. First, descriptive (...) legitimacy plays an evaluative role: Institutions can fail to convince citizens that they have a right to rule and can be ranked by how well they do so. Second, descriptive legitimacy plays a normative role, because if an institution fails to convince subjects of its right to rule, this gives them a reason not to comply with its directives, even if it satisfies philosophers’ standards for possessing such right. (shrink)

How should political leaders address the emerging climate crisis if citizens are reluctant to accept costly but necessary climate action? In this article, I address this question by harnessing insights from the realist tradition in political theory. I propose that the realist legitimacy framework provides action guidance by offering two broadly applicable heuristics for political agents: responsibility and responsiveness. These heuristics collide if citizens are unwilling to accept policies designed to secure a nation's long-term stability. Faced with this problem, some (...) authors make the supposedly realist argument that policymakers in liberal democracies should prioritise responsibility over responsiveness and embrace eco-authoritarianism to address the climate emergency. Against this line of argument, I maintain that the realist legitimacy framework entails no such commitment. Instead, realists must emphasise that responsible climate action entails a sufficient degree of responsiveness. I conclude by sketching how this insight may guide democratic leaders and climate activists in the future. (shrink)