Aside from global warming
I get what you are saying. But that improvement has been possible only because of global warming. Today we have more energy (=workforce) at our hands than ever before. This has imported things, but it's living on bored time Global warming will start to deteriate our world in multiple ways, I fact it is doing so right now.
A collapse of this system build on sand is a very real possibility. And it is a very real possibility that it will take less than a generation to happen.
I find it fascinating that so much of astronomy is having data and trying to make educated guesses about what that data could maybe indicate. It shows just how much more there is to find out, realy.