My article “The Global Crisis and the Psychological Feasibility of Internationalism” is part of the Social Philosophy and Policy special issue on Global Crises, edited by Allen Buchanan. In this article I revisit the motivational critique of contemporary conceptions of cosmopolitan justice. I distinguish two ways of understanding this critique as leveling the charge of infeasibility against cosmopolitanism. Cosmopolitan motivation can be understood to be infeasible because it is impossible or because it is not reasonably likely to be achieved if tried. The possibilistic understanding is not persuasive, given that examples show that cosmopolitan motivation is possible. The conditional probabilistic understanding is more compelling, by contrast, because under certain social conditions it may not be reasonably likely that cosmopolitan motivation is achieved if tried. I argue, however, that whether cosmopolitan motivation is infeasible in the conditional probabilistic sense depends on malleable social conditions, given that, according to a plastic account of the human moral mind developed by Allen Buchanan, social conditions can undermine or favor the formation of cosmopolitan motivation. I illustrate this plastic account by showing how it can explain recent anticosmopolitan orientations as “tribalistic” reflexes to global crises, like the COVID-19 pandemic, which involved competition for survival resources and (existential) threats. I conclude that cosmopolitan motivation is not infeasible under all social conditions and that cosmopolitanism therefore requires bringing about and maintaining those social conditions under which cosmopolitan motivation is feasible.