The assumption here is that we became humanoid-like creatures without meat, and then began eating meat.
This, I believe, is false - us eating meat and becoming human-like creatures happened at the same time, and some would go as far as saying that we became "human" BECAUSE we eat meat. We do not have large stomachs and the need to feed most of the day like herbivores - our stomachs are small, efficient. While we can consume plant matter, most of us here accept that a purely vegetarian diet is inherently flawed. Grains are nowhere near this picture.
Now, taking the overabundance argument - grains and water are NOT in overabundance for us - we are MAKING an overabundance for ourselves, allowing ourselves to reproduce in numbers beyond what is sustainable by the environment. Eventually, the system will topple over.
- If it was cute and cuddly at some point, eat it. Ignore everything else. -
- Food is first, and foremost, nothing more than fuel. -
- The body is animal. The mind, however, is not. -