> Our brains are big enough now after generations of evolution.

Err... bigger isn't always better, but I won't say no to a bigger noggin.

> Time to put those big brains to use so we can figure out how to continue the existence of the human species.

I wasn't aware we were heading toward extinction? There are billions of us, you know?

> I really doubt it'll be by continuing to eat lots of cows.

I like chickens, turkeys, goats, sheep, and all the other domesticated animals too. There's fish as well. Oh, and there's pigs too. I don't think we've ever relied on a single animal for sustenance?