"Violence breeds further violence until the only law is whatever is willed by the most powerful."

The will to power is one of Nietzsche's most enduring philosophical legacies. It is those whose will to power is most ruthless and cunning who succeed in imposing their will on others.  Such men as manage to transcend the mundanities and restrictions of society are Übermensch, or supermen.  I could attempt to summarize this concept but Nietzsche does it so well himself here:

Anything which is a living and not a dying body (...) will have to be an incarnate will to power, it will strive to grow, spread, seize, become predominant - not from any morality or immorality but because it is living and because life simply is will to power (...) 'Exploitation' (...) belongs to the essence of what lives, as a basic organic function; it is a consequence of the will to power, which is after all the will to life.                                                                                         (Beyond Good and Evil, s.259)