You cannot explain obese babies by saying they don't get enough exercise. Also, you're recommending solutions before you understand the problem. Did Americans

You cannot explain obese babies by saying they don't get enough exercise. Also, you're recommending solutions before you understand the problem. Did Americans suddenly lose all self-control in 1980? And if they did, why? Getting more exercise, and eating more green vegetables and less sugar is clearly a good idea, but the central mystery - why do people get fat - remains unexplained. We should unravel it.