How can nation states react or accompany economic agents in activities which are less and less linked to the nation state? Is the real debate not better encapsulated in a clearer consensus on subsidiarity? Are the present boundaries in Europe representative of homogenous nation states? What do we do about emerging regionalism?
Again, as with the first pillar, what can we learn from the history of our continent which has experienced different models: domination of one nation state over Europe, more or less holy alliances among the biggest, stifling coalitions, anarchy of a myriad of small states etc.