Maybe agriculture didn’t become important to people until large mammals were hunted into extinction and having to rely on smaller game opened an opportunity for agriculture and animal domestication and husbandry.
The North American megafauna, 30+ genera strong, were wiped out by the end-Pleistocene comet strike that caused continent-wide wildfires 12,800 years ago, as recorded in Antarctic and Greenland ice cores. This comet strike coincided with the beginning of the Younger Dryas cold spell, and is suspected of causing it. North America at the time boasted giant sloths, mastodons, mammoths, dire wolves, camels, horses, saber-tooth cats, and beavers, bison and bears much larger than what is left. Their fossils mostly appear right up to the continent-wide black mat of platinum-enriched soot, and not above it.
So those remaining of people who had been making Clovis spear points were obliged to shift to hunting the smaller game that remained, and made the smaller Folsom and other projectile point styles after. The continent-wide uniformity of Clovis points before the strike may have been a consequence of their status as trade goods, where deviation would reduce their value. After, the trade networks may have been disrupted, or maybe smaller points were easier to make, so were less valuable to trade. Most questions will probably never be answered.
There is a good survey article on the status of the end-Pleistocene comet strike by Martin Sweatman. Follow references from there to Antarctic ice cores. (Boslough and Holliday have a great deal to be ashamed of.)
There are all sorts of things that can influence consumption patterns. Change in climate could result in fewer sources of food as drought or inclement stunted certain crops which cascaded into fewer food sources for upstream predators where at the apex we had our fore-bearers who may had decimated populations till there were not enough to sustain the species.
My hypothesis takes that further and shows that it was the biggest cultural change in human history creating the concept of “capital” and is now counter productive to the long term success of humanity
Consensus seems to be that it’s combinatory between loss of habitats from warming and over consumption
Hunting to extinction is a holdover from "Clovis First" doctrine.
Stop with the assumptions
That’s taken into account for in acceleration, however megafauna extinction events start 50kya and are confidently correlated with human population increases.
This paper discusses YD in the all cause:
We have no reliable data about human population levels in North America, so nothing to correlate to extinctions.