The nature and roots of European integration as one of the most successful models of post-integration after World War II, Due to its role in reducing conflict and the spread of peace between European countries, and because of the importance and role of the European Union in the current international system, It has always been a matter of interest from scholars and political theorists. Although various national, regional, and international variables were effective in the post-war European integration, the variable that we referred to in this article was the role of identity components in expanding cooperation and integration between European countries. The main question of this study is how does European integration create a European identity and promote peace in post-war Europe? The research hypothesis is that the European Union has been a project to save European countries based on Mythology and antagonism. The findings of the research show that European identity is a political and discursive and the result of the deconstruction of the discourse of national identity and its nodal point, Mythologies such as unity in diversity, cosmopolitan Europe and exceptionalism, as well as antagonism In order to reduce internal conflicts among European countries.