'The term 'existential threat' may be overused by those who explore global governance; but it undoubtedly describes climate change and pandemics, two of the four mega-dangers that preoccupy Michael Bess in Planet in Peril. It is hard to believe that international cooperation remains a tough sell in 2022. Imagine: global problems require global solutions! Bess spells out concrete, and hopefully doable, steps toward overcoming polarization and fragmentation. Let's hope he's right.' Thomas G. Weiss, CUNY Graduate Center