“Is belly fat human or just American ?”
human
populations which formerly did not have an obesity problem are becoming far more obese than Americans as they adopt some of the late modern American nutritional patterns. China was shocked to discover after a recent government survey that found their obesity rate is higher than in the U.S.
We’ve always had bread and beer ... is it TV and chairs ?
You also have some developing countries where it is still a point of pride to have sufficient resources to become fat. It is a sign of wealth, or at least non-poverty, which becomes more of a problem as they move out of poverty—especially considering how starchy some traditional diets.