Most policymakers realize the urgency of combating the existential threat of climate change. Yet the same policymakers seem much more sanguine about the ongoing de-globalization, which is occurring through a combination of old fashioned protectionism and emerging geo–political concerns. Some believe we can compartmentalize action on the climate, shielding it from the hostility that increasingly characterizes economic relations between even friendly countries today. This is a pipe dream. Not just politically but also economically, continued growth of cross-border flows of trade, capital, technology, information, and people—how the speaker defines globalization—is essential to tackle climate change. Climate action and continued globalization are joined at the hip.