There’s a major pattern of energy in universe wherein the very large events, earthquakes, and so forth, occur in any one area of universe very much less frequently than do the small energy events. Around the Earth insects occur more often than do earthquakes. In the patterning of total evolutionary events, there comes a time, once in a while, amongst the myriad of low energy events, when a large energy event transpires and is so disturbing that with their general adaptability lost, the ultra-specialized creatures perish.
Violence has always been and remains a central interest of humankind and a recurrent, even obsessive theme of culture both high and low ... It engages the interest of children from an early age, as anyone familiar with the classic fairy tales collected by Grimm, Andersen, and Perrault are aware. To shield children right up to the age of 18 from exposure to violent descriptions and images would not only be quixotic, but deforming; it would leave them unequipped to cope with the world as we know it.