Are We in a Zero-Sum Game?

Greeks get pretty offended to hear Britain now described as the cradle of classical civilisation in that way. I'm saying that the civilisation has spread beyond Greece. And that we are all its children. The idea of both reuniting the marbles in their place of origin where they can be beautifully displayed right where they were first created would be an astonishing act of generosity and morality. If certain ideas are followed through, like the ones advocated by the Parthenon Project, we would get some magnificent Greek treasures in return.