In recent decades there has been increasing interest in issues of social cohesion and inclusion. This interest has been spurred by the economic and political impact of globalisation, the increasing movement of peoples of diverse cultures from the developing to advanced western economies, violent disturbances in urban areas and concerns over terrorism and the loyalty of minorities. Major disturbances have been linked to immigration. England has experienced episodes of conflict since the 1958 Notting Hill riots, with the most serious recent occurrence the 2001 riots in the Midlands and the North.