Primal is based on the hunter/gatherer lifestyle. Humans are omnivorous we eat it all, it is how are teeth are designed, our intestines etc. To think that ancient man would not hunt/ eat meat when presented seems a bit odd to me. They would also seasonal fruit, berries, tubers, nuts and whatever they can get their hands on.
A good read with some research links
and a lot more in Cordain's books etc
@ OP I notice you are now saying you should be allowed to raise questions, of course you should. This is all about questions but you raised a Vegan agenda without any supporting data.
PS Still waiting for some credible research from you!?!
Eating primal is not a diet, it is a way of life.
Don't forget to play!