A noted thinker has warned about a 'dictatorship of moral relativism.' But some norms do vary according to circumstances (it would be wrong to drive on the right in England, wouldn’t it?) Besides, some moral questions are confusing (is capital punishment murder?)
So is there anything about right and wrong that doesn’t change (like what marriage is? or does that change too?) Can we know it? And is all this just 'Christian morality,' or can it have traction in the public square?