There is a famous quote from Kenneth Boulding
“Anyone who believes in indefinite growth in anything physical, on a physically finite planet, is either mad or an economist."
In my opinion, if we want progress, there is no other way but to believe we can achieve infinite growth, because even if we can't, we are forced to innovate along the way. I sure don't want to live in an agrarian society just because we don't have infinite resources.
All we need to do is invent replicators like they have on Star Trek and we're home free. Just jigger atoms around and we're gold. Plus the transporter where we can just instantly transport anywhere we want to go in the world instantly.
It's all really simple when we finally get that going.