 He cited Immanuel Kant as the first to consider a three-pronged approach to the morality of armed conflict and concluded that a third branch of just war theory, the morality of the termination phase of war, had been overlooked.A related concept to the "jus post bellum" is the "lex pacificatoria", the law of peacemaking by treaty to introduce the "jus post bellum" phase.The purpose of the concept and its usefulness depends on whether it is considered as a moral or a legal concept.