Full Idea
Three concepts about morality emerge from the Reformation period: that moral rules are unconditional demands that lack rational justification; that moral agents are sovereign in choices; and that secular powers have their own norms and justifications.
Gist of Idea
In the Reformation, morality became unconditional but irrational, individually autonomous, and secular
Source
Alasdair MacIntyre (A Short History of Ethics [1967], Ch.10)
Book Reference
MacIntyre,Alasdair: 'A Short History of Ethics' [Routledge 1967], p.126
A Reaction
I get the impression that a rather frank admission of the role of self-interest emerged at that time as well. It is only in the late seventeenth century that the possibility of a secular altruism begins to be investigated. But there's Shakespeare...