That's one of my bigger concerns about Afghanistan
Sure, we go in and help the Northern Alliance or some other group kick out the Taliban. How do we know they'll end up being any better? For that matter, they could just as easily end up being worse, as hard as that is to imagine right now.
There is talk of bringing back the Afghan King, at least as a figurehead, to help create a representative democratic government. That sounds like a good idea but going from words to deeds can be a difficult proposition.