Machiavelli has been accused of being immoral for giving ‘cruel’ advice to the prince in The Prince. Dictums like ‘ends justify the means’ have largely been associated with Machiavelli without going into the details of the Prince and understanding the circumstances in which it was written. If the world around us is uncertain, then, the kind of policies which should be adopted by the statesmen is dictated by questions of survival and necessity and not any abstract morality. Machiavelli never supported the opinion that Prince needs to be immoral. This paper is an attempt to understand realist morality in international politics. To do that, writings of Machiavelli, Morgenthau and other prominent realists are interpreted.