What is world-systems analysis? Distinguishing theory from perspective

World-systems analysis is a well-established but poorly-defined critical research tradition in the social sciences. Its undisputed progenitor, Immanuel Wallerstein, steadfastly maintains that world-systems analysis is not a theory, yet it is widely referred to as such by commentators, critics, and practitioners alike. The resolution to this conundrum is to identify the defining elements of world-systems analysis as a perspective for understanding human society, then to evaluate propositions based on these defining elements as theories that have been conceptualized from a world-systems perspective. In this paper five defining elements of world-systems analysis are identified that together support a central theorem that the core-periphery hierarchy of the modern world-system can best be understood in terms of state strength and cultural integration. A further conjecture is made that the successor world-system to the current capitalist world-economy is more likely to be an American world-empire than the socialist world-government craved by many world-systems analysts.