Fun fact: people used to need to eat 4,000-5,000 calories a day because of how much physical work they were doing each day. Sowing, threshing, harvesting, all by hand. Breaking up sod and soil, moving rocks around, herding cows and sheep, etc.

Think of people today like Michael Phelps who used to eat something like 7,000 calories or more a day because of how much training he was doing. But of course all those calories were coming from healthy things that give us energy, not bloat us or drag us down like sugar and unhealthy fats.

People technically eat way less calories today, but the problem is that we aren't active, and those calories we eat are all empty anyway, which will make us more hungry in the long run.