 In addition to questions of efficacy, to the extent that peoples or groups have rights to collective self-determination, intervention by a liberal group to induce a non-liberal community to adopt liberal principles will be morally objectionable. As with individuals, liberals may think that peoples or groups have freedom to make mistakes in managing their collective affairs. If people’s self-conceptions are based on their participation in such groups, even those whose liberties are denied may object to, and perhaps in some way be harmed by, the imposition of liberal principles (Margalit and Raz, 1990; Tamir, 1993). Thus rather than proposing a doctrine of intervention, many liberals propose various principles of toleration which specify to what extent liberals must tolerate non-liberal peoples and cultures. As is usual, Rawls’s discussion is subtle and enlightening. In his account of the foreign affairs of liberal peoples, Rawls argues that liberal peoples must distinguish ‘decent’ non-liberal societies from ‘outlaw’ and other states; the former have a claim on liberal peoples to tolerance while the latter do not (1999a: 59–61). Decent peoples, argues Rawls, ‘simply do not tolerate’ outlaw states which ignore human rights: such states may be subject to ‘forceful sanctions and even to intervention’ (1999a: 81). In contrast, Rawls insists that “liberal peoples must try to encourage [non-liberal] decent peoples and not frustrate their vitality by coercively insisting that all societies be liberal” (1999a: 62). Chandran Kukathas (2003) — whose liberalism derives from the classical tradition — is inclined to almost complete toleration of non-liberal peoples, with the non-trivial proviso that there must be exit rights.