Eat right. Lay off the booze. Take a damned bath. It's all good advice, we suppose, but scientists say if our ancestors had followed it, we'd probably still be hanging out in the forest munching chiggers off each other's backs.
It turns out that all of our bad habits came about for a reason, and in order to become nature's biggest winners, we first had to act like pretty big losers.
Ever stop to wonder why humans don't have fur? Scientists have; after all, humans are one of the few mostly hairless mammals on the planet.
With some exceptions.
It's not a minor point; our hairlessness is a big reason why human civilization even exists. Without that natural insulation of fur covering us, we had to create clothing, and groups living in different areas produced varying levels of pigmentation to protect their exposed skin from the sun, leading to the development of our various races.
Oh, and the need to keep warm may have also contributed to our ancestors learning one other mildly important skill: making fire.
"Awesome! Let's throw some shit on here and see what happens to it."
So how did we wind up as the hairless monkeys we are today?
We were filthy.
Yes, one leading theory is that we did such a horrible job keeping our fur clean, parasites became rampant. Particularly body lice we picked up from gorillas (don't judge, the Pleistocene period was a crazy, experimental time). So eventually, not having fur for the little bastards to nest in became an evolutionary advantage, and hairless offspring became the norm. It was certainly better than, you know, washing.
Bathing is for pussies.
So if you've ever worn an outfit purely made up of the only items of clean clothing you had left, or gone to the laundromat in your pajamas because all of your clothes were so dirty you didn't think they were medically safe to wear (Yeah, you know who you are), it's time to stop feeling bad.
After all, we as a species actually went naked because we couldn't be bothered to clean our once naturally occurring monkey suit.
Obesity is the plague of the Western world--here meaning any place where you can purchase fried chicken filled donuts.
Obviously we know why people want to eat. In addition to filling the void where something called earnestness used to be, it gives us the energy to go on living. But why would humans have evolved to crave fat and grease even if our brain knows it will kill us? If evolution's so smart, why don't we hate deep-fried chocolate cake?
Yes, that actually is a thing. From This Is Why You're Fat.
Well, speaking of that big brain of yours, you have it thanks to gluttony. Specifically high fat and high calorie food. There are plenty of animals that eat simple, healthy, plant-based diets, and for the most part, they don't tend to be particularly bright.
Dumb, yet delicious.
Most of the planet's sharper animals are, like humans, essentially scavengers. A certain amount of intelligence and long-term memory is required to remember which berries are a tasty treat and which will make you shit your intestines inside-out. But what vaulted humans above and beyond competing animals like rats, to the point that we build the cities and they have to crawl through our sewers?
What we did better than them was discover ways to cram our fat faces with the richest, fattiest foods mother nature had to offer. We used tools to crack open animal bones and skulls to get to the greasy bone marrow and brains, and if we could have deep-fried the animals we caught, we would have.
Our large, juicy brains are really all that sets us apart, and they consume a huge amount of energy. The kind of energy that could only be provided by big fatty slabs of animal flesh. Experts believe that only the relentless stuffing of our faces with the ancient equivalent of fried cheese kept us going as a brainy species. And we used this increasing brain power mainly to find (you guessed it) new, creative ways to stuff our faces.
Early humanity built its whole operation around it--the parties that went out hunting ancient critters for their awesome, fatty meat contributed to the creation of the first tools, and strengthened tribal bonds. So laugh at the fat guy chowing down on buffalo wings all you want, but he's the reason your brain is complex enough to realize how hilarious he is.