We can begin by accepting Bergesen's call for a new model that better represents the "distinctly 'political' economy" of the actual world and the prominent role of the "political/military component" in its overall structure. This is very much in the spirit of Frank's work in Reorienting the 19 th Century. We also share much agreement with Bergesen's critique of Wallersteinian or "Standard World-System Analysis" (hereafter SW-SA), including several points of criticism Frank and others have made in the past, when developing an alternative world system (without a hyphen) history (Abu-Lughod 1989;Frank and Gills 1993;Denemark et al. 2000). It is unfortunate that Bergesen does not reference this previous research examining centuries and even millennia of what Bergesen calls "historically conserved trade structures" in world system history.Bergesen also makes a further call, for "a new understanding of the role of intercontinental trade as the essential relation of the world economy." We would amend this by saying that although "trade" on an inter-continental scale is a constant, and in fact, a constituent feature of world system structure (for five millennia), and it is true that trade may be the essential mechanism of the world system, it is misleading to call trade the essential relation. The essential relation is rather that of "accumulation" of wealth, capital, and power within the world system. The pursuit of this accumulation affects the overall pattern of trade (as a cause to an effect) while also shaping "systemic relations between societies" as Bergesen puts it.In regard to Bergesen's critique of the role of the "capitalist mode of production" in SW-SA, we would agree that the capitalist mode of production in itself does not adequately account for the origins of the modern world system. We also agree that "capital" pre-dates the modern economy. However, in today's world, the form "capital" and social relations based on the capitalist mode of production have extended and deepened to an historically unprecedented degree.We must disagree with Bergesen's assertion that "there is no way to move theoretically from relations between whole zones of the world to relations between classes within a zone." World System history (without a hyphen) has from its earliest formulations (e.g. Gills and Frank 1990) indicated that a structure of inter-class relations exists in a world system, based on the "inter-penetrating accumulation" between different zones of the world system. These inter-class structures both extend beyond the borders of any formal political entities and significantly influence the pattern of class relations within political entities. "Accumulating and expanding