A new long book on this. Link to LRB review which is also long but some will enjoy reading it: Steven Mithen reviews ‘Against the Grain’ by James C. Scott · LRB 30 November 2017
Liked, presuming you read it through. Humans living in close quarters is just the thing to allow thoughts to cross-pollinate, and Ag allowed that. It also allowed little-league diseases to flourish. What new cusp do you see? I guess it must relate to fast and wide information exchange.
i did read the review, seems like a lot of guesswork. the cusp i was thinking of is living a fossil fueled life, chemically enhanced farming and expectation that there will always be food in the supermarket.
Human transition from hunter-gatherer to agriculture was very poorly recorded. Much of what we can learn is in pollen in lake sediments and stable isotopes elsewhere. It is fun to think about but much will never emerge from behind the veil.
Sometimes, I think the uncertainty of the drawn conclusions is more exciting than complete, validated evidence.