The author examines the problems of multiculturalism in the light of today’s new phenomena of migration. The quality of reception depends not only on the cultures of the host countries, but also on several variables: the type of economy it has, how functional it is to methods of production and the homogeneity of the cultures in question. The phenomena of migration that used to take place within the industrialised world were functional to the model of development of the host countries and fed by people coming from comparable cultures of origin. The forms of migration taking place today are often conflictual and dysfunctional. The circulation of people and work is one of the great problems of globalisation today and should not be looked upon as just a risk. The process of globalisation is contradicted if it only works to the advantage of that part of humanity that enjoys the citizenship of developed countries. The author examines the new tasks facing legal theorists who wish to construct a system in which the right of goods in the global market is accompanied by a right of people on the global scene.