Maybe I’m not explaining myself well. The point I’m trying to make is distilling this differences down to one variable is inaccurate. Diet may be the main one but it is not the only one. To your point about it being a tropical paradise where food was plentiful and easily available; that may be so but hunting, fishing, collecting fruit etc takes a lot more effort / burns more calories than driving to the shop. Please don’t misunderstand me, I’m not trying to argue that poor diet is not the reason so many people are overweight. What I am trying to say is that there are also other factors at play that should not be dismissed as irrelevant. To your point about calories not causing obesity. This is again oversimplifying a complex topic but to look at it purely scientifically it would be physically impossible to gain weight if the total calories you consumed were less than total calories you burnt regardless of where those calories come from. When you get right down to it you cannot cheat this equation. Calories in > calories out = weight gain. Calories in < calories out = weight loss. To your final point, I do have an open mind. That is how I am able to appreciate that the cause of obesity is not purely diet. To be honest I found this last comment a little unnecessary. You don’t know anything about me, my background, qualifications or the reason I’m here on Nostr.