In response to Organ Morgan's posting below:

Actually the only two animals that wage war on the planet are humans and ants.

In many ways the ant society is very similar to our own. They have a big fat bitch in control of it all who does absolutely sod all apart from shag and reproduce and tell everyone else what to do. There's a definite hierarchal structure to their society. They have armies and workers and even nurseries to raise their off-spring. They even have farms where they grow their own food. And, more to the point perhaps, they also have no brains what-so-ever, never ask questions about what they're expected to do, and build huge eyesores in the middle of the desert. (For a human comparison please see Las Vegas, Cairo and Sydney.)

Other animals hunt each other for food, as you correctly point out. But unless you intend to eat the Iraqi peasants once you've bombed the shit out of them, it's a bit of a misnomer to compare human behaviour with normal animal instincts.

The main difference between human and animal social structure, of course, is that animals rarely elect a creature of obvious sub-species to be their pack leader.

I am currently working on a seventy-foot high mechanical ant-eater to solve this world's problems once and for all.