Recent research projects, publications, and above all the results of developer-funded archaeology provide materials for a re-assessment of the impact of Hadrian's Wall on the indigenous peoples whose lands it transected. Previous analysis has been concerned with the greater or lesser degree of ‘Romanisation’ of an Iron Age society perceived as little changed under Roman rule, with the Wall seen as a bureaucratic border running through an homogeneous frontier zone, as described by C.R. Whittaker. Although the local settlement pattern survived the original Flavian conquest of the region intact, it is now apparent that the building of the Wall under Hadrian had profound and far from benign consequences for local people. To the north of the barrier the traditional settlement pattern was largely abandoned and new social authorities emerged, while to the south there is evidence for new economic structures imposed from outside and the settlement of immigrants. The paper considers the extent to which these developments were the outcome of conscious policies by the Roman authorities.