" Most folks in the western world consume twice as much protein as they need per day (or so I've read)."
From what I can figure out, they consume about twice as much, on average, as their recommended daily allowance. Since that is twice as much as they actually can get by on, that means they consume four times as much as they need.
ShakaHara: Sanskrit for vegetarianism. Shaka=vegetable. Hara=consumption, eating. With perhaps a few exceptions, I think we should be able to live well, without animal husbandry. Both plants and animals need to be fed. Although peas are naturally carnivorous, they can be fed with green manures, turned in cover crops, and composted plant matter; animal matter is not needed.