The first world came out fine thanks to advantages it had when it was developing, advantages that the third world does not have today.
And we see that your "advantages" are:
First, there was no first world before the first world. This meant there was little pressure from above, because there was no "above". There were less/no AGW alarmists and tree huggers getting in the way of industrious businesses from improving the economy necessary to pull a society into the first world.
Normally, people would consider a working example as an advantage.
Second, pollution s not seen as a huge global problem. Your country pollutes? That's your problem. The notion that we're in a global village and your pollution will affect the whole world later was yet to be popularized (one reason being there were less AGW alarmists pushing the narrative)
Ok, where's the disadvantage here? I thought at first you were speaking of pollution holding back the third world. Or that somehow there was a global aspect to pollution which was relevant to your claim.
But that's not what you actually wrote. With this and the previous paragraph, you seem to saying that some people thinking pollution is a big deal and some people don't. While that is what I'd consider a fact, it is a fact which is completely irrelevant.
Third, the world economy was less globalized. Globalization increased the effects of international pressure, but not from AGW alarmists. The pressure comes from owners and shareholders, and they pressure third world factories to keep working and polluting to keep up production.
Such as the pressure to control corruption, upgrade one's society to first world levels, and improve the well-being of one's citizens? A pressure which accompanies a surge of wealth with which to accommodate the pressure? Again, where is the argument here?
And that pressure existed in the first world as well, yet things turned out well anyway.
Furthermore, globalization creates a moral hazard covering up the harms of pollution. After all, Pollution Respects Distance, so the owner of the factory doesn't see the damage he's doing, nor would other first worlders enjoying the products made by that factory. The third world people who are suffering are too far away to be able to seek compensation.
Reading stuff like this, I get the impression that some people out there think it's a law of physics that belching smokestacks must exist somewhere in the universe in order for us to have a nice civilization. It's just not true.
There will always be some degree of pollution and other externalities just because we're human. The developed world has demonstrated that this can be controlled. The rest of world in turn is following that same path.