Peter Attia· MD
john speakman came along and he said i'm not sure i'm buying this whole idea he said i think it's freedom from predation back in history we will pray then there was a certain point where we learned to use tools and hunt together and we stopped being prey and we started being predators and when we switched from being prey to predators then we didn't need to hide in our burrows and eat the limit the least we could because every time you came out of your burrow you were potentially exposed to a predator we could sort of walk around and eat kind of ad-lib in that case the genes that were being selected for that gave us satiety mechanisms that kept our weight down no longer were being selected for it wasn't that nature was selecting four genes that made us fatter it just wasn't selecting for genes that kept us thin and that and then what happens is called drift