[eropple]

> People have had adequate food for quite long and not grown fat.

That's revisionist, both in terms of "for quite long" (food insecurity was common in America until about World War II, and massive food surplus available at consumer-cheap prices begins a little later; other countries still suffer from food insecurity today) and that people haven't grown fat when able to do so. Being wealthy enough to the point of being able to be fat has been A Thing for a thousand years. We know this because the medieval Catholic Church felt that they had to preach moderation; if they had to preach it, it's because it wasn't happening as a universality.

[smileysteve]

Also revisionist is sedentary lifestyle, which still isn't as true in many regions of the world.

In the past 50 years, we have the normalization of computers / fax machines, fast food, fast commercial air travel.

In the past 75 years, we have the normalization of suburbs, television, and personal automobiles, personal phones.