As pointed out by it was traditional in the genre of Mirrors of Princes to mention fortune, but "Fortune pervades The Prince as she does no other similar work". Machiavelli argues that fortune is only the judge of half of our actions and that we have control over the other half with "sweat", prudence and virtue. Even more unusual, rather than simply suggesting caution as a prudent way to try to avoid the worst of bad luck, Machiavelli holds that the greatest princes in history tend to be ones who take more risks, and rise to power through their own labour, virtue, prudence, and particularly by their ability to adapt to changing circumstances.