 In On Liberty Mill argued that “Liberty, as a principle, has no application to any state of things anterior to the time when mankind have become capable of being improved by free and equal discussion” (1963, vol. 18: 224). Thus “Despotism is a legitimate form of government in dealing with barbarians, provided the end be their improvement…” (1963, vol. 18: 224). This passage — infused with the spirit of nineteenth century imperialism (and perhaps, as some maintain, latent racism) — is often ignored by defenders of Mill as an embarrassment (Parekh, 1994; Parekh, 1995; Mehta, 1999; Pitts, 2005).This is not to say that such Millian passages are without thoughtful defenders. See, for example, Inder Marawah (2011). Nevertheless, it raises a question that still divides liberals: are liberal political principles justified for all political communities? In The Law of Peoples Rawls argues that they are not. According to Rawls there can be a ‘decent hierarchical society’ which is not based on the liberal conception of all persons as free and equal, but instead views persons as “responsible and cooperating members of their respective groups” but not inherently equal (1999a: 66). Given this, the full liberal conception of justice cannot be constructed out of shared ideas of this ‘people’, though basic human rights, implicit in the very idea of a social cooperative structure, apply to all peoples. David Miller (2002) develops a different defense of this anti-universalistic position, while those such as Thomas Pogge (2002: ch. 4) and Martha Nussbaum (2002) reject Rawls’s position, instead advocating versions of moral universalism: they claim that liberal moral principles apply to all states.