Coito ergo sum wrote:50 years ago, Americans were generally not overweight - maybe about 15% of the population, as I recall. Today, 65% of the population is overweight. What happened? A genetic mutation en masse making most of us addicted to food or contract an obsessive compulsive disorder?
Isn't it just possible at all that what happened is that the culture changed, and the average number of calories people eat per day increased, while the number of calories we burn per day decreased (due to an increasingly sedentary lifestyle), and lo and behold the percentage of overweight people increased? After all, the numbers back that up. It's a straight line correlation better than the "hockey stick" global warming graph. Our food intake started going up about 50 years ago, and that's also when television watching and other non-active activities went up as well (reducing the amount of calories we needed to burn to move around). Lawnmowers changed from non-powered push-cutters, to power drive mowers to riding mowers. Walking to school went away. The video game was invented in the 70s. Outdoor activities steadily declined over time.... eat more...exercise less..........gain weight..... isn't that a simpler explanation than arguing that 1/2 the population contracted an addictive/obsessive disorder when previously only a small fraction of the population suffered from that disorder?
Calling it a disorder doesn't really get at the truth. It's only a disorder from the point of view of modern lifestyles. We evolved as hunter/gatherers, travelling on foot over rough country, climbing trees etc. etc. to find our food.
You needed many more calories per day to survive, because you expended a lot of energy catching and collecting your food.
We are still set up for that lifestyle, nothing has changed. We have not evolved to sit in front of a screen all day, or to drive home, and get a weeks food in one half hour at the supermarket.
The tendency to constantly nibble, and eat more is hard-wired into us over hundreds of millions of years. It's not surprising some of us can't cope with the change. What might manifest as a "disorder" or addictive trait today, would have been a life-preserver to our ancestors.
As you say, even fifty years ago, it was not that much of a problem, with kids playing outdoors and adults walking far more, and fewer labour-saving gadgets.
It's not that people are contracting a compulsive disorder, the tendency has always been there, and now it's a real mismatch between our evolution, and our lifestyle.
You can call it addiction, disorder, or mismatch, the facts for the people experiencing it are the same. It's in our genes, hard-wired into our brains, and today causes us problems.
What today manifests as a harmful addiction, fifty years ago might have been relatively harmless good appetite, and a million years ago, a life saving trait.
If you're one of the ones who it causes problems for, you've got two options, go back to huning and gathering, or somehow overcome the tendencies which you have inherited. And it's not easy. Make it easy, and you'll make a fortune.
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