So do civilizations that engage in GMO and Round-up.
Now its only my word against yours. You say cannibals die off. I say GMO and Round-up using civilizations die before the cannibals do when the food runs out I can guarantee you.
One of the last civilizations might be a group of feral mormons in the salt lake flats after the GMO's destroy the yeast/shroom like structures neccesary for seeds to germinate killing anything on the surface of the planet that uses seeds. In combination with Bee's dying I have a pretty strong hunch that a good human bicep will cost you an arm and a leg.
Now its only my word against yours. You say cannibals die off. I say GMO and Round-up using civilizations die before the cannibals do when the food runs out I can guarantee you.
One of the last civilizations might be a group of feral mormons in the salt lake flats after the GMO's destroy the yeast/shroom like structures neccesary for seeds to germinate killing anything on the surface of the planet that uses seeds. In combination with Bee's dying I have a pretty strong hunch that a good human bicep will cost you an arm and a leg.