If there ever was a litmus test on whether the world would cooperate in solidarity in the midst of the greatest global challenges, the COVID-19 pandemic provided such a test given its transferability across borders and the need for a rapid global response. In this blog post I argue that the onset and response to the COVID-19 pandemic has been a watershed event that has significantly – or perhaps irreversibly – ushered the world where cooperation will be more challenging than ever before.