The comments from that post largely echoed a theory that I've developed and embraced regarding humans eating meat in general. I've had this conversation many times, and almost to a time the person to whom I've spoken has taken a viewpoint opposite mine, which is why your lovely comments were so interesting to me.
The premise of this theory is that humans were not designed to eat meat.
As I've mentioned in the past, I watch a lot of documentaries. I like to watch animals running around in their natural habitats trying to survive. I get a kick out of that, for some reason. I also like to watch Bear Grylls or Les Stroud bumble around in crazy remote locations, showing us survival techniques. Next time that I wake up, having mysteriously been transported to a remote wilderness location, I'll thank these guys and their tutelage.
In any event, you watch enough of these shows, and (as CarrieBOO observes), it seems to me that you can't help but notice that the animals that were designed to eat meat have a few things in common.
BIG, POINTY TEETH is one of those things.
Big, strong claws are frequently a part of the design:
^%^#%$#%^$ no, no, nooo...THESE claws:
The bottom line is that, given our design (without the big brain), I really can't see humans living long enough "back in the day" to procreate.
Can you see Pee-Wee Herman out in the wild, looking for food?
'Daddy, I'm hungry. Can you get me something to eat?"
"I want cave bear!!"
Humans don't have any of the tools that would be necessary to catch meat, even if we define meat as the dodo bird (nice and friendly and would walk right up to you for a cup of coffee). History proves that we'd have eaten all of them in no time, and then what? Kangaroo look nice.
Small claws, no huge teeth...I can do this.
We don't have the speed to reliably catch squirrels or chickens, we don't have the claws to rip into thick cow hides (even if we got past the horns and legs that kick harder than the Rockettes), nor do we have the teeth to tear off large chunks of meat. And not for nothing, a big part of eating meat in the animal kingdom is defending your food from other beasts that also want to eat it. Seems to me that a dead monkey in the wild would serve as good bait for other animals who want to eat human.
I do think, though, that we are pretty well designed for eating plant and staying out of the way of things that eat meat. Opposable thumbs, for instance: great for picking through thorns to get at the berries and climbing trees to get away from dogs and kangaroos (even dodos). Our front teeth are a great design for scraping fruit rinds like melons, and the rear teeth are good for grinding other plant matter like corn.
Standing upright allows us to carry fruits back to the young'ns and also to stand like a meerkat looking for danger.
You know, I don't think that we'd be able to reliably catch a meerkat without a bigger brain. Pretty damn easy to catch a watermelon though.
Good eatin' too.
PLUS, you can make clothes out of them:
And protective gear:
Really, who wouldn't want one of these: