• In all mammalian species that have so far been carefully studied, the rate at which their members engage in the killing of conspecifics is several thousand times greater than the highest homicide rate in any American city.

    Daniel Dennett: In all mammalian species that have so far been carefully studied, the rate at which their members engage in the killing of conspecifics is several thousand times greater than the highest homicide rate in any American city.
    "Darwin's Dangerous Idea: Evolution and the Meanings of Life". Book by Daniel Dennett, 1995.