“That is why she sees in their minds the sign that the peace process is receding and that the 1998 agreement is being cancelled to add what people now take for granted.” In an interview with the Guardian, Commissioner George Hamilton of the Police Service of Northern Ireland (PSNI) said: “The last thing we want is all the infrastructure around the border because there is something symbolic and it becomes the target of violent dissidents.” A narrow majority of British voters decided to leave the European Union in a referendum in June 2016. The complexity of Northern Ireland`s unique status has hampered efforts to conclude the divorce. As a member of the EU, the UK is part of its customs union and internal market. After Brexit, there will be both: elevating the status of the Irish border to a customs border with controls and controls associated with it. To avoid this result, given its negative practical and psychological effects, EU leaders and then the UK. Prime Minister Theresa May has agreed on a “backstop.” She said that until alternative mechanisms are developed, the UK must remain in a customs union with the EU and northern Ireland must respect the rules of the internal market for goods.3 The backstop has proved unpopular domestically and has contributed to Parliament`s three-time reject of May`s agreement. The Northern Ireland Democratic Unionist Party (DUP), whose 10 MPs backed May`s minority Conservative government, opposed a special status for the region. Brexiteer supporters feared that the country would remain subject to EU rules indefinitely and would not be able to negotiate free trade agreements. 6 This very brief historical sketch of the evolution of cross-border social and commercial flows since 1973 shows that the socio-economic normalization of the Irish border is not only the result of European decisions and influences. Above all, it is a direct result of the evolution of relations between London and Dublin on the issue of Northern Ireland in the wider context of Europe. The Irish border, which has been an intra-European border since 1973, has facilitated a finely balanced political compromise on the whole of Ireland and on the internal dimensions of the Northern Irish problem4.