I never much needed Nietzsche to draw attention to the illusory nature of morality - there are no moral truths, only perspectives - I knew it from experience. People do what they do, get what they can get, driven by some primal force like everything else in nature. “Will to power” was the expression the great man used.

Reasoning comes into play when individuals are called to question or to justify their actions at which point a case is conjured up in support. Different days, different cases, depending on whichever interests are at stake. If the logic is plausible, if the argument accords with some widely held convention, and if joined up sentences are used, then their actions may well be acceptable.

I have trouble with this. And being able to see an illusion at the heart of morality is of little help. If anything, it’s a hindrance. Moral truths are important to humans, illusory or not, and believing in them makes a difference to how a life is lived.

And also, a distinction has to be drawn between a moral code that condones narrow self interest, and one that is more enlightened, one that is not always beneficial to act out of. Even the great sceptic, David Hume, was able to argue for that.

It may all be about perspective but the nature of the perspective is basic to the validity of case. In the post-modern world we may have abandoned moral absolutes but that is far away from an extreme relativism, the idea that anything goes.