If I lived in 2019 BCE, I would’ve regarded myself as a “modern” (inhabiting a smarter, better world) while simultaneously looking down on those poor primitives coming before me not knowing any better. (Sort of like we do today).
A thought like this helps perhaps explain why pseudoscience, e.g. belief in a flat earth for instance, etc. continues to shape thinking today: the chronological present never quite escapes the intellectual past. I don’t live now but in the future’s poor past.
I’ve literally met people who entertain 8000 year old ideas as though these notions are “current”.