The political parties play the most influential role in our political
society. An important trend in public opinion regrets this situation.
But are really political parties always noxious? If they are, have
not they been unavoidable for two centuries of liberal régime?
Machiavelli developed for the first time a political theory that
upholds that society could receive a great profit from political
conflict through the maintenance of liberty. This paper deals with
the peculiar meaning of this gain of liberty due to political conflict
in Machiavelli's 'Discorsi' and 'Istorie Fiorentine'
