As we expand and extend our applications of world-system theory, as we explore the shifting interplay between cores and peripheries, as we see boundaries emerge and dissolve, we also fix world-systems theory itself on the map table. What is its core? What are its peripheries, or would it claim that all human interactions fall within its sway?Thomas Hall, for example, does not take quite the entire map, but takes "intersocietal interaction" as the world-systems domain.