[Matt Wiser]

I'm not saying that there won't be UN involvement in space, but any new treaty-especially one that sets up some kind of taxation on lunar (or asteroid) resources to fund UN operations, is something that doesn't seem realistic. Taxation is a power that governments reserve for themselves: hence the successful fight against the airline ticket tax.

You're more likely to have a "scramble for space" along the lines of the Scramble for Africa back in the 19th Century. The allure of revenues from space resources is something that national governments will be tempted to get their hands on, for very obvious reasons. And those governments will do whatever it takes to protect their citizens and companies from the depredations of others. The UN could serve as a forum for such disputes (and there already is a UN Outer Space Treaty, signed back in '67), where these can be (hopefully) resolved amicably. But if history is any guide, there will be times when diplomacy fails, and the sword is unsheathed. War in space will happen-it's only a matter of time, and whether it'll be rival companies, rival countries, or a space Navy vs. pirates, it's going to happen.