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Nuraghi are ubiquitous in the Bronze Age Sardinian landscape, but the reasons for their distribution and wider function remain poorly understood. Here, we evaluate the argument that these megalithic fortified towers were situated for visual control and thus represent nodes of political or coercive power. Using a dataset of 102 nuraghi, we perform a normalized cumulative viewshed to quantify nuraghe visibility in southwestern Sardinia. We analyze the co-occurrence of highly visible areas with variables pertinent to economic control of the landscape using a model comparison approach. The results suggest that there is no underlying structure to the location of the nuraghi that can be related to visual appreciability of the wider environment, indicating that visual control was not an important consideration during the later 2nd millennium b.c. We consider what the driving rationale may have been behind such a predominant site type that is yet apparently unrelated to political control. [ABSTRACT FROM AUTHOR]

Caribbean sugar mills were powered by water, animals, wind, or steam, yet the evidence indicates major differences between islands in terms of which mill type predominated. We suggest that windmills offered few, if any, advantages over animal mills and several serious disadvantages. Why, then, were so many windmills built during the eighteenth century on some of the islands of the eastern Caribbean and so few on others? Here, we draw on Costly Signaling Theory to help explain these patterns. The preference for windmill-building may have had less to do with functional requirements or economic efficiency than with cultural competition, the signaling of membership of the planter class, and the display of power throughout the plantation landscape. [ABSTRACT FROM AUTHOR]

Caribbean plantation landscapes were designed to mediate interactions between planters and enslaved laborers. In this paper, wind-powered sugar mills on the island of Montserrat are singled out as being prominent components of the plantation environment that were not only economically productive, but also served as markers of planter power and control. The mills' distinctive shape and height render them instantly identifiable, and their integral role in the sugar production process makes them signifiers of that industry. Here, viewshed analysis is employed to demonstrate the visual ubiquity of Montserrat's sugar mills before emancipation, emphasizing the affective power of these edifices even beyond the borders of the individual plantations they served. [ABSTRACT FROM AUTHOR]