We are tall now, but used to be short when food was scarce. There was a class difference in height back then, but I think that was the case in most nations since poverty meant not always enough food during the three periods of growth spurt - in the womb, the first 2 years of living and puberty.

Weight is going up here too, but not dramatically so. There is a worrying fixation on weight though. Personally I suspect that obesity (not just a couple of extra kilos) is often linked with an unhealthy relation with food, where food becomes a substitute for something else. And if that something else is to look skinny you have got yourself a feedback loop.

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