Existence, for all organismic life, is a constant struggle to feed—a struggle to incorporate whatever other organisms they can fit into their mouths and press down their gullets without choking. Seen in these stark terms, life on this planet is a gory spectacle, a science-fiction nightmare in which digestive tracts fitted with teeth at one end are tearing away at whatever flesh they can reach, and at the other end are piling up the fuming waste excrement as they move along in search of more flesh.... Life cannot go on without the mutual devouring of organisms. If at the end of each person’s life he were to be presented with the living spectacle of all that he had organismically incorporated in order to stay alive, he might well feel horrified by the living energy he had ingested. The horizon of a gourmet, or even the average person, would be taken up with hundreds of chickens, flocks of lambs and sheep, a small herd of steers, sties fill of pigs and rivers of fish. The din alone would be deafening... each organism raises its head over a field of corpses, smiles into the sun, and declares life good.

Ernest Becker, Escape From Evil as quoted by the Shakespeare Theatre