Dear SGIR-members, we are delighted to announce that Lora Anne Viola is the winner of the 2021 ECPR Hedley Bull Prize in International Relations with her magnificent book The Closure of the International System. How Institutions Create Political Equalities and Hierarchies (Cambridge University Press, 2020). Have a look at the laudatio by jury chair Mary … Lora Anne Viola wins ECPR Hedley Bull Prize in IR with The Closure of the International System