As he notes, bad policy can make things much worse, but good policy can only do so much. What happens in the world is much more affected by culture and relationships than it ever is by government policy. I like his concluding paragraph:
Finally, we should all probably calm down about politics. Most of the proposals we argue about so ferociously will have only marginal effects on how we live, especially compared with the ethnic, regional and social differences that we so studiously ignore.