Abstract:
After World War II, the leaders of several European countries, including Britain, France and so on, founded the European Common Community, whose regulations concerning unified customs, market opening, and economic cooperation laid a foundation for European integration. In the course of the European Union's shaping and growth, though the repeated disputes over bounder opening, population mobility and frontier control among the member states delayed the shaping of the system of immigration policies, they at last signed a number of cooperative agreements and treaties. However, the implementation of these agreements and treaties brought about different results in different countries as a whole and only a limited proportion and scale of the population moving between member countries. This means an task and demanding challenge to the Union's member countries to naturalize and control immigrants.
