The new field of sustainability science that has arisen over the past three decades, largely oriented toward cities, under closer examination may prove to be wholly inadequate to deal with the issues it was initially designed to address. Built largely upon modernist value assumptions, its entire range of outlooks has failed to account for the character virtues needed to realize sustainable approaches for the future, which are better found working within different religious traditions’ theologies and ethical outlooks. In light of this, the present article takes up a replicable agenda for analyzing how these particular character virtues—with special focus on parsimony and futuremindedness—work with regard to visions of sustainability that promise to bring about a more just transition in cities.