Why are people fat in North America?

It sounds like a sophisticated question with all sorts of complicated answers...but, hell no, the answer is pretty simple.
We just eat too much food!!
The more stuff you shove down your throat, the fatter you will become.If you eat 10 Big Macs a day you will become fat. If you drink 10 milkshakes a day you will become fat. Like..this is not rocket science. People just don't get it! I even get  it ...and I'm not even a professor or anything.
What I don't understand is why educated people don't get it. I mean, you've got all these really clever people that are fat...like really fat! I'm not sure if you've heard of this fat guy, Michael Moore. He's like a really smart dude and he makes all these amazing movies about bowling for Columbine and wars and capitalism and socialism and other sophisticated stuff. This guy's a friggin' genius...but he can't figure out that if you eat too much food you get fat!
Maybe, because if you're rich and you've got loads of money and you've got nothing to do all day, so you just go to Whole Foods and buy all these fancy organic foods.What do you do when you get home? Of course, eat the stuff....and get fat. I mean you don't want it to go to waste!
In Africa you don't have this problem. In Biafra, for example, you never saw a fat kid. They never had money so the kids didn't get fat. Granted there were pictures of kids with fat bellies, but that was due to malnutrition...so that doesn't count. Actually, in South Africa you'll see fat people because those guys have got money. They've got gold and diamonds there, so they've got lots of money.....but there's also a major AIDS problem there ...that's a whole different ball game!!
Getting back to smart people, I think that Harvard and Berkeley and all those elite Ivy League institutions should change the way they accept students. They should check the students grades, of course, but before that they should check their weight. If  a potential student weighs like 300lbs then obviously he's not smart enough to be an Ivy Leaguer. I mean, if he's not smart enough to figure out that if he stuffs his face with food he'll get fat, then how the hell is he going to be smart enough to become a rocket scientist or a CEO. But, on the other hand,  the Deans are smart guys and they don't care if the students are smart or fat...as long as they get $60,000 a year for tuition, they'll enroll them in the program.