Since the end of the Second World War, for more than half a century, foreign aid has been an important component of North/South relations, both in qualitative and quantitative terms. From the very beginning, it has been conceived and presented as a technical enterprise aimed at promoting the development and modernization of recipient countries and at complying with the rich States' obligation to assist and transfer resources to poor countries. These assumptions still affect the theory and practice of foreign aid, (...) hindering its analysis and evaluation. The main purpose of this essay is to highlight, on the basis of the results of some recent historical investigations on the matter, that foreign aid is a tool of foreign policy, a practice that has political origins, aims and effects that interfere with both the relation between aid and development and the definition of a duty of material aid. (shrink)