We have been in a permissive culture too long. Sugar is less evil than the legalized drugs and cigarettes; I do not want to open a can of worms by bringing up guns. It is probably due to our success: abundant food supply.
My friends from
Asia were amazed by some of our giants - one took pictures for proofs
back home. Singapore is the other extreme: All over-weight (by their
standard) government employees are forced to exercise. Happy to stay in the middle of the extremes!