„We live in a world of borders. Territorial, political, juridical, and economic borders of all kinds quite literally define every aspect of social life in the twenty-first century. Despite the celebration of globalization and the increasing necessity of global mobility, there are more types of borders today than ever before in history. In the last twenty years, but particularly since 9/11, hundreds of new borders have emerged around the world: miles of new razor-wire fences, tons of new concrete security walls, numerous offshore detention centers, biometric passport databases, and security checkpoints of all kinds in schools, airports, and along various roadways across the world.“

In Thomas Nail, Theory of the border, 2016