The Tuscania Archaeological Survey investigated the archaeology of the countryside within a 10 km radius of the small town of Tuscania some 80 km northwest of Rome. The aim of the project was to contribute to present understanding of the processes that have shaped the development of the modern Mediterranean landscape as a physical and cultural construct. The specific research context of the project was debates about these processes in Etruria, the western side of central Italy that was the heartland of the Etruscan civilization in the mid first millennium BC: the character of prehistoric settlement prior to Etruscan urbanization; the relations between Etruscan towns and their rural populations; the impact on Tuscania and its landscape of being absorbed into the expanding Roman empire (‘Romanization’) and its economic structures after about 300 BC;the collapse of that system in the mid first millennium AD and the subsequent emergence of nucleated medieval villages (incastellamento); and the vicissitudes of peasant life through the political upheavals of medieval and post-medieval Italy. The chapter closes with an explanation of why we selected Tuscania and its intensively-farmed volcanic landscape as an ideal ‘laboratory’ for investigating this long-term landscape history, and how the project was planned.

We first summarise the principal findings of the Tuscania Archaeological Survey in terms of the diachronic settlement trends over the past 7500 years that are reconstructed in the previous chapters. The Tuscania story partly mirrors settlement models proposed by other authors for central Italy as a whole and partly diverges from them.In the second section we use a GIS analysis to compare the respective effectiveness of the three landscape sampling strategies we employed. This suggests that all three were equally effective in revealing settlement patterns in the Republican and Early Imperial phases characterized by dispersed and dense rural populations, whereas they revealed contrasting information about the less dense and more variably patterned Etruscan settlement pattern.We review the contribution of the project’s geomorphological studies to the Mediterranean alluviation debate, indicating complex interactions between climate and human actions in landscape formation. The project’s 7500–year ‘archaeological history’ chimes with Peregrine Horden and Nicholas Purcell’s characterization of Mediterranean landscape history as “continuities of form or pattern, within which all is mutability” (The Corrupting Sea, p. 523).

In order to assemble an ecological community it may be helpful to know not only how many parts there are, but what kinds of parts there are. Communities require at least two classification systems that provide simultaneous and somewhat contradictory lists of parts: phylogenetic and functional. These two classification systems can be arranged hierarchically so that many parts (species) are nested within a smaller number of groups (functional types). Even with objective classification techniques, it is difficult to know how many groups exist, and the number selected may be somewhat arbitrary. There does not seem to be a way to tell, a priori, how many functional types we can expect to find in a specified landscape or habitat. This raises difficult questions about the nature of fitness landscapes and the geometry of n-dimensional trait space.