Hence, the USDA food pyramid. Everything wrong with your diet in one handy chart. Follow it to obesity. This chart is made by people(entities) that want to sell you food. Or, you could go with what has worked forever, animal protein and animal fat. A long time ago, fruits and vegetables would get you through the hunt but meat kept you alive. Stored carbs could be what allowed you to survive the winter if the hunt failed. But ultimately to survive, you need animal protein and animal fat, it’s got what people need!