|After sixty years of integration, the idea of a united Europe has been put to the test. The purpose of this article is to put to discussion the degree of integration achievable between the member states. European Union
integration which has been achieved so far is evaluated in the light of the three schools for regional integration: neoliberal models, the dirigiste school and structuralism. A new division of integration forms is proposed: technical
and substantial integration. Technical integration is exogenous in nature and refers to the objects of integration, while substantial integration is endogenous
and refers to the subjects of integration. The article focuses on cultural differences in the EU as a factor underlying substantial integration.