Beijing wins the place as world capital, with Reykjavik coming in second. Messrs applez and zengineer questioned the prospects of an age of peace and prosperity, certainly the compatibility of such with the existence of a world government (there, it would have been much more impressive if I had said 'friends from A to Z', it might have given the impression of hundreds).
I was expecting a more science-fictional flavour to the replies. I am sure there are Heinleins in which the world capital is in San Francisco, and in the Star Trek universe the council of the Federation is based there too. So that would be my vote, although I think San Francisco is too small to accommodate it.
I am sad to say that only burkesworks, oldbloke and zengineer have fully embraced the new paradigm where it is possible to have lower taxes, better public services and a pony. Better public services and world peace win overall, with cookies putting on a last minute surge to beat the pony, which is in last place.
Also, Channel 5 is currently showing trailers for Miss Congeniality, which shows that the correct line is 'harsher punishments for parole violators.... and world peace', so, not for the first time, I have been misquoting something for years.
Just as for years I wrongly quoted Captain Oates as saying 'I'm going out now, I may be some time' not 'I'm going out now, I'm off to find an 11 year old girl to impregnate' http://www.guardian.co.uk/uk_news/story/0,3604,811382,00.html