For explaining the actions of people, I much prefer a line from some show (don't ask I can't remember). The line goes something like: "Whenever you see someone running, you must ask yourself, are they running too something or away from something? The answer is always both to some extent."

Through my experiences, I take it to mean that sometimes people carry out feral actions because they are running from some inner demon as opposed to running towards a future they desire. I guess when put like that it could be called compulsion or nature, but perhaps with some deep thoughts about their behaviours or a higher goal to run towards, people might become less inclined to behave in a feral manner.