“It was not just the extremes of callousness [of Romans] that unsettled me, but the complete lack of any sense that the poor or the weak might have the slightest intrinsic value.

Why did I find this disturbing?

Because, in my morals and ethics, I was not a Spartan or a Roman at all. That my belief in God had faded over the course of my teenage years did not mean that I had ceased to be Christian. For a millennium and more, the civilisation into which I had been born was Christendom.

Assumptions that I had grown up with - about how a society should properly be organized, and the principles that it should uphold - were not bred of classical antiquity, still less of ‘human nature’, but very distinctively of that civilisation’s Christian past. So profound has been the impact of Christianity on the development of Western civilisation that it has come to be hidden from view.”