The difficulties that have always been highlighted by the political, social and economic diversity of Europe's heritage - as part of a large, but still disparate territory - have resulted, since the eighties, in the development of the cohesion policy.
Dificultăţile evidenţiate mereu de diversitatea politică, socială şi economică a moştenirii Europei - ca parte a unui teritoriu extins, dar încă disparat - au dus, încă din anii '80, la dezvoltarea politicii de coeziune.