The book attempts to explore the scenario of a world where migration knows no borders. Given the current context of strict border controls and a heightened social and political awareness of the issue, this scenario of a world where each person would be free to move around from one country to another and settle wherever he or she chooses, may appear somewhat utopian. But today’s Utopia could become tomorrow’s reality and this publication attempts to analyse the ethical and economic challenges as well as the social consequences of totally free movement all over the world.