This paper by the Harts is a fantastic one. The Mbuti are a tribe of rainforest hunter-gatherers. Like all modern hunter-gatherers, they do not represent some sort of paleolithic hunter-gatherer state. The Mbuti have a symbiotic trade relationship with nearby agriculturalists, which seems to have evolved due to desire for starch. This fits quite well with my belief that much of human history has been about the acquisition of starch and fat.