Abstract
The megalithic framework of the Grands Causses region contrasts between densities and voids: the effect of spatial scales rooted at the center of the megalithic axis that runs from Quercy to Ardèche is the dolmen framework of the Grands Causses region, surrounded by areas of lower density that open onto an arc-shaped void. The dense areas that persisted from the IVth to the mid-IInd mil-lennium BC reflect the degrees of anthropogenic spatial influence, with evidence of territorial components, networks, and dynamics extending to the outer limits. The effect of spatial scales and a multi-scale approach limit any biases related to the erosion of the vestiges and bring to light different aspects of the spatial contrasts between dense areas and voids. Thus, a comparison of observations reveals a spatial practice dictated by a relationship between central areas and peripheries. It consists of associating stable, central placements with other more precarious placements vulnerable to external fluctuations, continuing up to the margins and outer limits. This approach reveals these oppositions with the diversity and complementarity of spatial units. At the local and sub-regional level with the Larzac case study, as well as in other zones of analysis around the Grands Causses, including the Avant-Causses, the Rougier de Camarès, the Lévézou and Ségala plateaus, there are signs of spatial dynamics that reflect instabilities, advances and retreats. Comparing the spatial scales makes it possible to go beyond the use of geographical determinants alone by considering multiple factors of spatial control during recent prehistory and up to its blind spots. The organization of agrosystems and the dynamics of anthropization are the foundations of the areas of greater density. For areas of void and low density, there is a systemic conjunction brought about by land with less potential or insufficient complementarity, remote or closed areas, obstacles relating to steep topography, basins, ridge lines, elevation, or reduced capacity of connections with diverse spaces.