By the end of this year, the G7 aim to launch an “open, cooperative international Climate Club” to foster coordinated action to achieve the Paris climate agreement’s maximum-warming target of 1.5°C without leaving anyone at a competitive disadvantage. Although we have been hearing calls for international climate action for decades, there is good reason to think that this time will be different. The Climate Club is the brainchild of German Chancellor Olaf Scholz, whose proposal is based on four premises. First, international climate action needs to be broad-based and consistent, with all club members aiming for the same objectives. Second,