I'll just say briefly now that if the basis of western civilisation can be described as a focus on reason, individualism and happiness on this earth -- ideas that were a product not of theologians but of Classical Greeks, ideas which were fortunately rediscovered for the west in the Renaissance -- then far from being any sort of foundation for these ideas, [C]hristian religion is at odds with all of them...However, I think that "reason, individualism and happiness on this earth", are an inadequate basis to describe Western Civilisation.
So does Hilaire Belloc, as shown by this quote from Survivals and New Arrivals: The Old and New Enemies of the Catholic Church:
The form of any society ultimately depends upon its philosophy, upon its way of looking at the universe, upon its judgement of moral values: that is, in the concrete, upon its religion.PC makes the error of pulling out a few aspects of Western Civilisation of late, that have made a real impact during this current period where civilisation appears to be in decline, while ignoring the society in which such ideas were able to bear fruit. Maybe Christianity is at odds with the ideas he puts forward because it is much larger and runs deeper than the proponents of such ideas would like.
For whether it calls its philosophy by the name of "religion" or no, into what is, in practice, a religion of some kind, the philosophy of any society ultimately falls. The ultimate source of social form is the attitude of the mind; and at the heart of every culture is a creed and code of morals: expressed or taken for granted.