> wrote
> Roughly ten thousand years, sure.

I've always read that we were vegetarians for roughly MOST of our existence
on earth prior to evolving larger brains.

The only reason we evolved larger brains that allowed tool building and
communications was that suddenly, not so very far back, we started to eat
meats. Proteins.

So I'm inclined to believe that most of our time on earth was in fact,
eating vegetables and grains. Meat's "new", relatively speaking, and most
scientists credit *it* with our leap in evolution.