Analysis, carried out within a wide chronological framework, of the variability of technological modalities for the lithic industries known from Yemen to date, has allowed a certain 'fine-tuning' in terms of our knowledge of the regional prehistory of Yemen. This research is founded on the definition of the environmental context of the region and the methodologies used for fieldwork and analysis. A focus on the Hadramawt region follows, which is used as a strong model for defining and orienting questionsrelated to the transformations of the role occupied by southwest Arabia throughout...