What puzzles me about ancient humans is they were as smart as we are, so why did technology advance so slowly?
As I understand it, this is an open question, but one explanation has a few factors: a) In the absence of many external pressures, hunting and gathering is actually a reasonably low-effort and flexible lifestyle. From a moment-to-moment perspective, agriculture (and our "technological" world) mostly doesn't seem like an improvement. Long-term, the quality-of-life improvements come about in resiliency and stability, b…
The accepted origins of agriculture keep fluctuating, but there's unambiguously at least 8 origins and maybe a dozen. The unambiguous origins are Mesoamerica, South America, Mesopotamia, Indus/Ganges, and China (all of which are also clearly independent origins of civilization), as well as North America, Ethiopia, and Papua New Guinea (which don't clearly form independent origins of civilization, although note word order in that phrase). There's probably more origins as well.
In general, a lot of early civilization development is one of those things that was traditionally understood to be difficult and everyone cribbing off of the one guy who did it (kind of like how the Industrial Revolution is generally though to have happened), but the more people started digging into the research, the more endogenous its evolution appears: independent reinvention of the Neolithic Revolution seems to be the norm, not the exception.