The European Union as an organization is built upon the idea of communication and agreement. Taking place in the years following World War II, the six countries that would form the beginnings of the European Union via the signing of the Treaty of Rome decided that the only way to move forward beyond the bloodshed and war that had caused so much strife for so long is to communicate with each other. Thus the European Union was founded, with the four freedoms at the forefront of its philosophy: freedom of movement of goods, people, services, and capital.
However, all of the history shared between these countries cannot be forgotten immediately just because of a cooperative effort between them. There are still fundamental differences between the various cultures of the now twenty-eight European Union member states. To overcome those, and to promote the heart of the four freedoms, the Schengen Agreement was signed, initially only between France, Germany, Belgium, Luxembourg, and the Netherlands in 1985.
The Schengen Agreement, signed in the city of Schengen, Luxembourg, aimed to create a single, unified European area wherein the internal borders are not subject to passport checks, allowing citizens of the European Union to move freely throughout.
The Schengen Area has been a source of great accessibility amongst European Union members, it is now causing distress among some of the member states, as the European migrant crisis has unprecedented amounts of refugees passing into the European Union.
The Schengen Area is only one of the major policy upon which the members of the European Union disagree on. Within the Maastricht Treaty, signed in 1992, the basis for the euro came into existence, and by 2002 all previous currencies for countries within the Eurozone were replaced by the it. The euro, similar to the Schengen Area, has had its share of critics and advocates, with the critics lambasting the foundation upon which the euro was introduced, and the advocates hailing its benefits as a singular link for trade.
It is clear that the members of the European Union do not agree on many things, and they have many reasons not to, but the European Union has come far along, finding compromises and dialogue where previously there was disagreement and war. And like all political systems, civil discourse should be expected, and solutions are not immediate, but the only way to solve problems short of dictatorial suppression or genocide is through communication, and in that regard the European Union is well on its way toward solving its problems.