The central argument according to Eric Corijn in the book of Benjamin Barber is that a legitimate political authority should be created that can add some governance, some regulation to the world system. Within the world system a democratic deficit has emerged that is caused by the process of globalization, in which international political and economic decisions are taken without reference to a global constituency, civil society, citizenship or global public opinion. Eric Corijn sees four strong arguments for an increased political role of mayors through a Global Parliament of Mayors. He also discusses three structural global challenges that can better be dealt with by cities than by dysfunctional nations: a) our relationship with nature, b) the growing social inequality, c) superdiversity resulting from migration and socio-cultural diversification. In dealing with these issues (the political agenda) the Global Parliament of Mayors should act in a pragmatic way.