When is it correct to say that a person's freedom is restricted? Kristján Kristjánsson offers a critical analysis of the main components of a theory of negative liberty: the nature of obstacles and constraints, the weight of obstacles, and the relation of freedom to power and autonomy. Through this discussion, which examines much of the contemporary work on political freedom, he develops his own theory of negative liberty, the so-called responsibility view, which meets many of the goals of advocates of positive liberty while retaining its distinctive negative nature.