The transition in thinking about borders shows how states gradually filled blank space, extending their sovereignty as far as they possibly could before inviting conflict. After states became imagined through maps, no zones were left that did not have a ruler, at least in theory. So drawing the lines on the map was, for the state, both an exercise of power and a way of preparing for possible future exercises of power. Crucially, Anderson focuses on the way maps shaped their readers’
imaginative capacities: rather than thinking of Thailand as a kingdom whose cultural, economic, and political influence spread a certain distance from Bangkok, Thais began thinking of their country as a territorial totality, defined by its limits rather than its center. In short, this shows how nations become imagined as at once sovereign and limited in their citizens’ eyes.