Yes, the key to any future will be learning how to live without the complex technology we’ve come to rely significantly upon.

I often wonder whether the decline will be a relatively quick Seneca cliff-type fall or a longer, drawn-out affair like that of the Roman Empire. My own sense is that once the power grid fails, a tipping point for a speedy 'collapse' will have been reached and then things will really go sideways--at least for those so-called 'advanced' economies that have lost their self-sufficiency skills/knowledge.

Regardless, the few that make it thru the ecological bottleneck we’ve laid out before us will have a much depleted world to leverage from and perhaps, just perhaps, those few will learn from the lessons of our recent past and live 'sustainably'; probably not, however, given how often this rise-fall cycle of complex societies has repeated itself. But I doubt we will ever 'rise' to our current levels of technology without all the surplus energy that has been afforded us via fossil fuels.