ask yourself this, and it is something i have considered a long time, if you were starving, if the world suffered a cataclysmic catastrophe that ruined crops, and decimated livestock like pigs, cattle, with no chance that they could replenish quickly enough, would you eat any other animal to survive. I believe that man's natural instinct is to survive, to go on, and anything that is edible would be eaten, including all the species that we love, like elephants, polar bears, or even in the worse case scenario, each other.