That is even more illuminating. They eat primarily unrefined carbs like rice, corn, and plantains, 2400~2700 calories worth of it a day (more than I eat!), and

That is even more illuminating. They eat primarily unrefined carbs like rice, corn, and plantains, 2400~2700 calories worth of it a day (more than I eat!), and yet they are very healthy and fit. Considering the numbers, it really looks like the difference is the amount of physical activity. I think that sedentary humans are just not supposed to eat as much as we think or want to do.