I was trying to compare apples to apples; Russian and Ukrainian women, they are of similar height to Americans.
BTW, remember the song "Back in the USSR"? Whole lot of truth there.

it's a combination of everything mentioned but from what I see the fat kids eat so much nutrition-less 'food' that they're never satiated and just eat ridiculous amounts of the stuff . . I eat 3 eggs, a small steak and some yogurt almost everyday for breakfast around 730am and don't even think about food again until close to 1pm because I'm full/satiated . . with all this processed and nutrition-less food you never get full, your body never signals that it's satiated and thus you just keep eating . . chips, cookies, cheese puffs that stuffs not food but makes up a large portion of most kids diets . . sugary drinks as well

parents think kids need that stuff and are deprived if they dont get it but I'd argue that growing kids need more real food and nutrition than anybody and because of that the nonsense processed stuff does more damage to kids long-term than adults

Remember when the poor people were skinny?

I'm still skinny but I prefer slim or slender.

Sugar is an addiction throw that it with sedentary life styles and you got a recipe for obesity.

As a kid, we had cured pork, air-dried link sausage, a flour barrel, and several lard stands in our pantry. Mom used those staples every day. We enjoyed hot bread with most meals. Mom nearly always had a homemade cake or pie. She also taught school. We canned and froze much of what we ate during the year. We plowed our garden with a mule.