 On MacCallum’s analysis, then, there is no simple dichotomy between positive and negative liberty; rather, we should recognize that there is a whole range of possible interpretations or ‘conceptions’ of the single concept of liberty. Indeed, as MacCallum says and as Berlin seems implicitly to admit, a number of classic authors cannot be placed unequivocally in one or the other of the two camps. Locke, for example, is normally thought of as one of the fathers or classical liberalism and therefore as a staunch defender of the negative concept of freedom. He indeed states explicitly that ‘[to be at] liberty is to be free from restraint and violence from others’. But he also says that liberty is not to be confused with ‘license’, and that “that ill deserves the name of confinement which hedges us in only from bogs and precipices” (Second Treatise, parags. 6 and 57). While Locke gives an account of constraints on freedom that Berlin would call negative, he seems to endorse an account of MacCallum’s third freedom-variable that Berlin would call positive, restricting this variable to actions that are not immoral (liberty is not license) and to those that are in the agent’s own interests (I am not unfree if prevented from falling into a bog). A number of contemporary liberals or libertarians have provided or assumed definitions of freedom that are similarly morally loaded (e.g. Nozick 1974; Rothbard 1982; Bader 2018). This would seem to confirm MacCallum’s claim that it is conceptually and historically misleading to divide theorists into two camps — a negative liberal one and a positive non-liberal one.