EU immigration has therefore caused the formation of a complex and controversial social and political process as a result of interrelated factors that are economic, political and social. Immigration in the European environment is discussed in this thesis through the identification of causes, impacts and challenges. For these reason, comers have arrived in Europe through several reasons like conflicts, poverty, and search for other better opportunities that have impacted societies in Europe, especially in the change of demography which can be seen as opportunities by some and challenges by others. Therefore, the goals of the present study are confined to the social, political, and economic consequences of Immigration in Europe. This paper considers the problem, challenges faced to services, social integration problems, and national security problems on the other side, it also considers the positive face of the immigrants in terms of diversification of culture, as being the economic boosters, and the solution of demography issues. As it turns out analyzing once again the discourses of populism and nationalism that came to the fore with the focus on immigration, the thesis measures the trends thrown up by the above discourses and their impact on shaping the desirable and non-discriminatory immigration policies at both European and national levels. In its economic part, it compares the supplanting of skills, the possibility of immigrants as innovators, and the role of an immigrant in pension schemes on the one hand, and immigrants competing for a job and taking the social welfare of society, on the other. To strengthen the criticism of grassroots utilization, the research emphasizes the need for integrating a hitherto juxtaposition of immigration, namely causes and domestic consequences. In this regard, this paper highlights the need to pursue conscious policies on integration and harmonization for purposes of fostering the development of social solidarity and proper management of implied diversity and inclusion.