Go ahead. You will be very impoverished compared to those who leverage the specialization and cooperation.
You will produce everything yourself from raw resources, dig up your own ore, build your own smelters, etc. And forget 3D printing, because you want to be disconnected from knowledge.
You want to go back to a caveman? That is what you are saying. I hope you realize.
More like smaller societies physically disconnected, not each on his own. Culture/Art you know is an oppressive beast and a topic untouched yet. Knowledge isn't everything.
I have canonical citations on those but hard to dig them up. I don't feel like being bothered at the moment.
It is a fact that Rome collapsed due to environmental degradation due to debt caused overintensive farming which lead to the inability to produce enough to sustain. But Rome's collapse had many facets, yet this was one of the fundamental factors. I had also a citation about pottery records showing farming was still increasing right up until the collapse. Also have much documentation about the environmental degradation and as always this caused the marginal utility of debt to go negative because the marginal increase in production from farms went negative.
Don't forget that Rome was entirely agriculture based. That was the reason the empire existed to build roads and military security to increase commerce from agriculture.
Do you have any reason to believe this is wrong?
Rome's collapse was political, cultural and scientific stagnation after the initial breakthroughs that made them an empire.
Greece collapse was as ever the internal strife, we worship Eris.