The third world can't pull itself up by it's own bootstraps, or won't? What made the US an immediate 'first world' nation? Was it born that way, fully industrialized and ready to go, or did it have to get going on it's own? Who helped the US to become first world, if it wasn't immediate?
The idea that somehow it takes a first world nation to give everything to a third world nation and that they can't industrialize on their own is arrogance at its finest. It isn't an easy process, sure, but it can be done if there's a will to do it. It is far easier to get it from people that have already done it, but the benefits are better if you do it yourself. Hell, we've probably had more than a few 'first world' nations that have fallen back into 'third world' status. Rome comes to mind. I'm sure they were 'first world' in their time, and they fell into disarray for a while. So, it seems like we've been able to reinvent the wheel a few times. I'm sure even if we left the third world alone, they could eventually figure it out.