The conventional view of Machiavelli is as an unscrupulous amoralist, for whom, as Alasdair MacIntyre argues, the only ends of social and political life ‘are the attainment and holding down of power’. Moral rules are merely ‘technical rules about the means to these ends’. Because Machiavelli viewed all humans as inherently corrupt, so ‘we may break a promise or violate an agreement at any time if it is in our own interests to do so, for the presumption is that, since all men are wicked, those with whom you have contracted may at any time break their promises if it is in their interest.’
https://kenanmalik.wordpress.com/2013/04/17/on-machiavelli/