I realized some time ago that I’m not separate from nature just because I have a primate brain, an upper brain. Because under the primate brain there’s a mammalian brain, and beneath the mammalian brain, there’s a reptilian brain, and it’s those two lower brains that made the upper brain possible in the first place. Here’s the way it works: the primate brain says, “Give peace a chance.” The mammalian brain says, “Give peace chance, but first let’s kill this motherfucker.” The reptilian brain says, “Let’s just kill this motherfucker, go to the peace rally and get laid.” Because the first obligation of any organism is to survive. The second is to reproduce. Survive is more important than fucking. Pacifism is a nice idea, but it can get you killed. We’re not there yet, folks. Evolution is slow, Small Pox is fast.
George Carlin