I think it's hard to make the case, which implicitly the left makes, that somehow the world would have been better off if the Europeans had stayed home. It certainly doesn't work for north America, that's for sure. I mean, I'm sure the Apache and the Navajo had all sorts of admirable traits. In the absence of literacy we don't know what they were because they didn't write them down. We do know they killed a hell of a lot of bison. But had they been left to their own devices, I don't think we'd have anything remotely resembling the civilisation we've had in north America.