We discuss how transgenerational communitarianism deals with public decisions involving tradeoffs between different generations’ wellbeing and having global consequences. Policies for tackling climate change are an example. Although there is a natural, evolutionary, basis for intergenerational altruism, most people lack the competencies for constituting a transgenerational community. Moreover, greater attention to future generations’ wellbeing need not substitute for collective action: a lower discount rate reflecting a stronger concern for future generations may even worsen their wellbeing. Finally, in a world of (...) irreducible value pluralism, there is no community of persons sharing moral values that can legitimize common policies for addressing global problems: only the common interest of avoiding destructive consequences may motivate collective action to face problems like climate change. (shrink)