Full Idea
Modern ethics generally considers morality much less a system for fulfilling human nature than a set of principles for dealing with individuals in conflict.
Gist of Idea
Modern moral theory concerns settling conflicts, rather than human fulfilment
Source
Linda Trinkaus Zagzebski (Virtues of the Mind [1996], II 7)
Book Reference
Zagzebski,Linda: 'Virtues of the Mind' [CUP 1996], p.255
A Reaction
Historically I associate this move with Hugo Grotius around 1620. He was a great legalist, and eudaimonist virtue ethics gradually turned into jurisprudence. The Enlightenment sought rules for resolving dilemmas. Liberalism makes fulfilment private.