In a context characterised by the shift from fordism to post-fordism in the Iberian peninsula, this thesis addresses the following question how are capital, governments and social movements organised in the processes of integration and resistance that affect foreign immigration' in Barcelona and Lisbon? Thus, in the first chapter, an analysis of the concept of "integration" is undertaken in order to understand the complexities and elusiveness that hide behind it, giving special attention to immigrants' integration literature. A distinction between systemic integration and social integration is adopted, and thus in the second chapter recent theorisation on capital and the state (i. e. systemic institutions) is approached, while in the third chapter social movements and organisations are taken into account. In chapter four epistemological and methodological elements are noted. The last three chapters are devoted to analyse original fieldwork data (mainly qualitative interviews): chapter 6 analyses immigration governmental policies at European, 'national-state', 'national-regional', and local levels; chapter 7 studies social and capital organisations in Barcelona in relation to 'foreign immigration'; and in chapter 8 social and capital organisations are studied in relation to 'foreign immigration' in Lisbon. Finally, some conclusions are revealed whilst other questions are posed.