The transnational movement of people has become one of the characterizing features of our global condition. These movements have not always been achieved under equal conditions. In many cases, the crossing of borders has entailed radically different consequences depending on, among many other things, who it is that crosses the border and where the movement originates from. Examining the global condition from this point of view presents challenging theoretical and philosophical as well as practical issues and concerns. This book grapples with the different facets of the current global condition, in particular the principles and practices of exclusion that the presence of strangers, aliens, and foreigners triggers and the mechanisms that are mobilized by the nation-states as well the general public to reinstate the alleged loss of sovereignty. My deployment of the question of sovereignty is inspired by Jacques Derrida's insistent critique of the theologico-political where he scrutinizes sovereignty in the discourses of self-mastery or egological ipseity, nation-state, or God. Placing the question of sovereignty at the center of my analysis, I focus on the manifold means and mechanisms that are reinstalled in response to the presence of otherness that is felt to be invading the space that is deemed to be one's own.