Given grand strategy’s concern with advancing overall interests, typically in the context of a significant threat, there is a pressing need for articulating a new sensibility about grand strategy that deals seriously with the climate threat. In particular, as I show in this essay, this new sensibility must account for the possibility of new actors having the capacity as well as the interest to act in a grand strategic fashion and to do so in a way that challenges the conventional wisdom about the centralized, coordinated nature of grand strategic action.