International migration, like trade, is a fundamental feature of the postwar liberal order. As states and societies become more liberal and more open, migration increased. Will this increase in migration be a virtuous or a vicious cycle? Much will depend on how migration is managed by the more powerful liberal states, because they will set the trend for the rest of the globe. This chapter discusses the need for the rights of migrants to be respected and for states to co-operate in building an international migration regime in order to avoid a domestic political backlash against immigration. It also presents the asymmetry of interests, particularly between the developed and the developing world, and underlines the implications for international co-ordination and co-operation.