The moral nihilist thinks there is no moral truth…..sometimes this takes the form of relativism, either a subjective individual relativism (morality is like taste) or a cultural version (when in Rome do what the Romans do).
The moral realist thinks moral truths are like scientific, mathematical or logical truths…out there, waiting to be discovered (or the dictates of a supernatural being).
In between are positions like moral constructivism and contractualism. The constructivist / contractualist thinks we make our own moral truths (individually and collectively). But we do so under certain constraints so we should not think that in morality ‘anything goes’. Something like objective truth is possible.
In my talk I want to survey positions taken by a range of thinkers in the middle ground, focussing on constructivism but also looking at recent books such as Philip Kitcher’s ‘The Ethical Project’ and Mark Johnson’s ‘Morality for Humans’. Both see human morality as contingent, experimental, a work in progress. Johnson’s most provocative statement, that moral fundamentalism is not just incorrect, but immoral. “Moral absolutism is immoral,” he argues, “in that it shuts down precisely the kind of empirically informed ethical inquiry we most need for our lives.”