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Originally Posted by Mr. White 
Dude, I'm not some kind of dumbass liberal. I understand what you're posting. Humans can easily catch frogs and snakes and crabs: white-meat, low-cholesterol sources of protein. That's not "hunting." That's more like picking nuts and berries but they squirm as we snag them.
And using tools and a bit more effort we had feasts on real food.
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But figure it this way. The average height of a man is 5'5" (Smithsonian.) Woman, 5'0". (Same.) Don't use the bizarre, hormone-inflated size of an American to figure necessary intake. Yeah, I was skinny and overendowed with slow-twitch muscle tissue so I could run anyone into the ground. Maybe that was uncommon enough to make me want to chase Olympic dreams (don't mock me just because I tore my tendons to shreds trying to do that). But my physique was a lot closer to the worldwide average than the flab-bellied couch potato. I ate a diet starved of protein for maybe 2-3 decades, and I'm no worse for it. Maybe there is some truth to the idea that humans, over a million years and more, adapted to low-protein diets.Except that your tendons imploded. Perhaps proper nutrition and weight training, both having been shown to increase the strength of connective tissue and bone in addition to muscle, would have made the difference.
The hormones most commonly found exogenously in the American diet are phytoestrogens and other such useless, detrimental crap - not test, which is apparently what you think is helping here. Plus, humans are incredibly smart at using tools - a 5footnaught guy with an atlatl is going to make a gazelle just as dead as a 7 footer.
The worldwide average is meaningless unless you are taking the average from over the entire existence of homosapiens - and even still, height isn't the variable we're talking about here.
Practically, increasing protein has the effect of increasing satiety which means less of a desire to eat more. Plus even if it burns "hotter", that just means its less metabolically efficient - which is great if you're trying to maintain/lose weight.
