To wonder about the idea of Europe is to wonder about the momentum that leads European citizens to merge in a shared political project. We can not identify that momentum with a mere interest in a single market. For that, it would have been enough the creation of a more or less sophisticated free trade area. But that can not be the real idea of Europe. As Professor Bailer reminds us, we find the idea of Europe, in the conviction that we share a common identity, a historical heritage, and, above all, the will to move forward together; and, by doing so, we are building a better society. After Second World War, Europe is completely devastated, both from an economic and moral point of view. European and North American leaders were concerned about: first, how to rebuild the European continent; and, secondly, what to do with Germany. How to ensure that Germany re-integrates into international society and that is no longer an aggressive power. Actually, the European integration process responds to these two concerns. During the early years, right after the war, we will find examples of international cooperation, intergovernmental cooperation between European countries and that will lay the cement of the European integration process. They are going to be, the prudent first steps in various areas. For example, from an economic point of view, there is an example of joint management of the Marshall Plan. They are forced to sit down and cooperate to jointly manage the aid that comes from the United States. In fact, this cooperation is the embryo of the current OECD. From a military point of view, we can place the creation of NATO in 1949, also, under the umbrella of the United States, the European countries are integrated into a military defence organization. And, from a political point of view, promotion of Human Rights, and consolidation of liberal democracy, an example of intergovernmental cooperation is the creation of the Council of Europe in 1949, whose European Court of Human Rights has been a beacon for many European countries that over the following decades have abandoned their dictatorial regimes and have joined the Council of Europe. But this intergovernmental cooperation examples had some shortcomings. There was no entity, within these international organizations representing the common interest from a supranational point of view. They were forums for discussion between states and only the own interests of each one were discussed. The founding fathers of the European Union realise that something more is needed. Something that is going to be designed by Jean Monnet, a high-ranking French official with an extensive international career who had lived in the first person the failure of the League of Nations after the First World War, when he realised that nobody was promoting the common interests from a supranational vision. That's the reason why he suggests to the French Foreign Minister, Robert Schuman to make a revolutionary proposal to the Germans. ¿And what is this proposal? The creation of the European Community of Coal and Steel, a new community that will manage the whole German and French production, of coal and steel. This control will be carried out by a high common authority formed by independent international officials. That is, France and Germany were giving up control over materials that were necessary for war. This French bet, that the German Chancellor Konrad Adenauer will accept immediately, and which will also be joined by Italy and the Benelux countries, is revolutionary because puts an end to a historical antagonism between France and Germany. France reaches out to Germany and bets for a path of reconciliation and forgiveness, unlike what had happened after the First World War with the Treaty of Versailles. The consolidation and success of this revolutionary idea, the first European Community and all the following European integration process is, above all, thanks to that political audacity of the founding fathers. the French Jean Monnet and Robert Schuman; the German Konrad Adenauer; and the Italian Alcide De Gasperi, they all witnessed the decline of their countries during the Second World War and realise that economic solidarity is going to be necessary in order to gradually create a new political community that is not going to replace national communities, but will complement them. Europe emerges as the cradle of multiple, diverse, shared and compatible identities. This is possible thanks to a singular trajectory of these European leaders. They are all influenced by borders, whose passports did not determine their affections. This is especially relevant to Robert Schuman and Alcide De Gasperi. Schuman was born in Alsace and Lorraine, De Gasperi in Trentino-Alto Adigio; both are areas that change jurisdiction after the First World War. Therefore, Robert Schuman, has French nationality after the First World War, but an academic background in German universities; so, a bilingual man with a cultural background imbued by two cultures. Also, De Gasperi, who was born in the Austro-Hungarian Empire, being part of the Italian minority that after the First World War became part of the Italian State. He is also bilingual and understands that borders are historical accidents that do not justify tribal hate. Monnet, a high-ranking French official, but also a cosmopolitan man who had travelled a lot and worked in many different countries. And Adenauer, an exceptional German politician who despises classic Prussian supremacism. All of them realised that history left them national communities, but strove to expand the political communities to which they belonged. Their political work, is what embodies better the spirit and idea of Europe: a determined commitment to reconciliation and the pursuit of common interests.