>>76560629
It doesn't matter if people are "sitting at home all day" or not. The brain uses more energy than any other organ. Additive DEE is a myth.

Primitive tribal people who walk all day have the same energy expenditure as modern industrialized populations.

What happened is that people were taught by the sugar industry that calories cause obesity (See: >>76560478 >>76560532 >>76560556 >>76560568 >>76560627) and as a result they started eating more carbs (See: >>76560205)

This isn't actually tough to figure out. People started eating more carbs. We know that for certain. The reason they ate more carbs is because of calorie propaganda.