This chapter summarizes the argument of the book. It recapitulates the global governance as a political system founded on normative principles and reflexive authorities in order to identify the legitimation problems built into it; it points to the explanation of the rise of societal politicization and counter-institutionalization via causal mechanisms highlighting the endogenous dynamics of that global governance system; and, it sums up the conditions under which the subsequent processes of legitimation and delegitimation lead to the system’s decline or to a deepening of it. In addition, the conclusion submits that the arguments put forward in this book are in line with a newly emerging paradigm in International Relations. A “global politics paradigm” is increasingly complementing the “cooperation under anarchy paradigm” which has been dominant for around five decades. The chapter finishes with suggestions of areas for further research.