Not the first time I see something like this. What I don't get is what do these people propose to do. Suppose many health troubles are caused by living in the c

Not the first time I see something like this. What I don't get is what do these people propose to do. Suppose many health troubles are caused by living in the cities and agricultural diet (which is highly speculative). Is there a way to feed 7-8-9 billion people by following a hunter-gatherer diet?