Sad news. Highly recommend his "Against the Grain: A Deep History of the Earliest States".
My one criticism was that when answering the question "why did people start eating grains", he never seemed to consider that it could simply be that people enjoy eating them.
Specifically grain being so calorie dense and pleasurable that we end up becoming beholden to its growth, with significant cost. Look at all the ideas permeating these days about dangers of high carb diets, this book [1] suggesting they make us stupid for example. Or about the link between metabolic disfunction and mental disorders [2]
[1] https://www.goodreads.com/book/show/17333302-grain-brain?fro...