His arguments are agriculture's health and societal effects. We wanted X from agriculture but we got X+1 (what human achievement doesn't result in this?) where +1 is some unwanted consequence (having to have more children to maintain a farmstead, rotting teeth, increase in belly size, the loss of the tribe (maybe alluding to dunber's number) His points make sense, in my opinion. He understands the pros are great but his argument is we did not foresee (or adjust very well to) the cons that come with the agricultural revolution.