Xall is starting along the right track.
I think the discussion is too specific.
Good. Take it wherever you choose.
Murder is a special and extreme form of a broader evil called force.
Does such a thing as “a broader good called force” exist? Is force morally neutral depending upon how it is wielded?
Strip down the discussion to force and you can avoid red herrings about chimps and lions murdering each other. Why is force wrong for humans to use against each other, but otherwise okay (or at least, not wrong) for animals to use in general? For that answer, I’d check out the entry on “Man,” then the entry on “Physical Force,” in the Ayn Rand Lexicon.
Man
"Man’s distinctive characteristic is his type of consciousness—a consciousness able to abstract, to form concepts, to apprehend reality by a process of reason . . . [The] valid definition of man, within the context of his knowledge and of all of mankind’s knowledge to-date [is]: “A rational animal.”
(“Rational,” in this context, does not mean “acting invariably in accordance with reason”; it means “possessing the faculty of reason.” A full biological definition of man would include many subcategories of “animal,” but the general category and the ultimate definition remain the same.)
Physical Force:
"Whatever may be open to disagreement, there is one act of evil that may not, the act that no man may commit against others and no man may sanction or forgive. So long as men desire to live together, no man may initiate—do you hear me? no man may start—the use of physical force against others.
To interpose the threat of physical destruction between a man and his perception of reality, is to negate and paralyze his means of survival; to force him to act against his own judgment, is like forcing him to act against his own sight. Whoever, to whatever purpose or extent, initiates the use of force, is a killer acting on the premise of death in a manner wider than murder: the premise of destroying man’s capacity to live.
Do not open your mouth to tell me that your mind has convinced you of your right to force my mind. Force and mind are opposites; morality ends where a gun begins. When you declare that men are irrational animals and propose to treat them as such, you define thereby your own character and can no longer claim the sanction of reason—as no advocate of contradictions can claim it. There can be no “right” to destroy the source of rights, the only means of judging right and wrong: the mind.
To force a man to drop his own mind and to accept your will as a substitute, with a gun in place of a syllogism, with terror in place of proof, and death as the final argument—is to attempt to exist in defiance of reality. Reality demands of man that he act for his own rational interest; your gun demands of him that he act against it. Reality threatens man with death if he does not act on his rational judgment; you threaten him with death if he does. You place him in a world where the price of his life is the surrender of all the virtues required by life—and death by a process of gradual destruction is all that you and your system will achieve, when death is made to be the ruling power, the winning argument in a society of men.
Be it a highwayman who confronts a traveler with the ultimatum: “Your money or your life,” or a politician who confronts a country with the ultimatum: “Your children’s education or your life,” the meaning of that ultimatum is: “Your mind or your life”—and neither is possible to man without the other."
