There's a reason hunter-gatherers were nomadic. If food became scarce in one area they moved to a place where it was more bountiful. > I can only imagine that

There's a reason hunter-gatherers were nomadic. If food became scarce in one area they moved to a place where it was more bountiful. > I can only imagine that our ancestors must of lived off greens. Yes. Greens in addition to meat, fish, fruit, berries etc. Living off greens only will lead to malnourishment. We're omnivores after all.