ie, we're all screwed, because human is what we are and will remain. That's one limitation that, by definition, we'll never exceed. Looking for mythical solutions outside of what we are is just another search for El Dorado.
Considering what is discussed is an ascent of understanding and/or awareness, perhaps it is your lack of such that allows an assumption of humans stalling at their present state instead of continuing a long evolution.
Does your local FSM cult require you to regard evolution as "mythical"?
Nirvana has been available to plain old human beings for thousands of years now, oh not-so-wise-one.
No Greg Bear trilogies required.
It's all right here, right now
if you look.