Gotta say I don't agree. Even during the most barbaric conflicts, the combatants tend not to eat each other. We can't go and buy a nice bit of braising human arm in Tesco. We don't kill to eat one-another - we kill each other because we DON'T communicate. We don't understand every little thing about each other, we can't comprehend everyone's view. But when one tribe disagrees with another we tend to hit each other rather than working it out through conversation. The whole point of mediation and international task forces in places like Sri Lanka is to get the two sides together to work things through. (Where, by the way, the two sides don't necessarily speak the same language - Tamil and Sinhalease). It has worked (eventually) in Northern Ireland, since the killing as stopped, and a power sharing government is building up. So I would say that if animals could talk we'd be more likely to kill them all, not because we want to eat them, but because we'd disagree with what they say.