 the contrast between a system of sovereign states and a centralized world-state is too crude. There are many other possibilities, including a state system restrained by international and intergovernmental institutions, a non-state-based economic system, a global separation-of-powers scheme, international federalism, and regional political-economic structures, such as those currently being developed in western Europe and the Americas (via NAFTA). (Satz 1999: 77–8)