Just one vital facet. More is needed. Take a look at the principles of Weston A. Price that were found in ALL healthy peoples all over the world with varying diets. Eskimos ate mostly meat. Polynesians ate mostly veges. But they ALL shared common principles that accounted for their extreme level of health and longevity. Fat was highly regarded by them all, thus, one of the vital principles of the traditional diets of our forefathers.