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You who prattle that morality is social and that man would need no morality on a desert island - it is on a desert island that he would need it most. Let him try to claim, when there are no victims to pay for it, that a rock is a house, that sand is clothing, that food will drop into his mouth without cause or effort, that he will collect a harvest tomorrow by devouring his stock seed today - and reality will wipe him out, as he deserves; reality will show him that life is a value to be bought and that thinking is the only coin noble enough to buy it.

Ayn Rand (1988). “The Ayn Rand Lexicon: Objectivism from A to Z”, p.323, Penguin
You who prattle that morality is social and that man would need no morality on a desert island - it is on a desert island that he would need it most. Let him try to claim, when there are no victims to pay for it, that a