International audienceThe aim of this paper is to analyse and to compare Aristotle’s and Plato’s opinions on crimes of passion; in particular crimes caused by anger in answer to an offence. In fact, an act of hubris was the worst injustice directed against a polis’citizen, an intolerable offence compromising his private and public identity. Plato’s and Aristotle’s opinions on moral and juridical weight of this offence agree; threfore their evaluations of anger are very different, almost opposite. So, which relationship can be established between the ethical considerations on anger of those two philosophers and the forensic practice, is a question to be answered. On this purpose, we will quote a famous speech of Lysiason a crime provoked by ...