It’s like déjà vu all over again. After launching a devastating but limited series of strikes on Iranian nuclear facilities and against the nation’s top military leaders and nuclear scientists in June last year, the United States and Israel recommenced hostilities against Iran at the end of February.

The objectives of this ‘war’ are similar — to eliminate Iran’s nuclear capabilities and remove the senior leadership of the Islamic Republic regime — but its implementation is more thoroughgoing, more open-ended, more uncontainable, and more problematic in terms of its basis in international law.

There is near consensus among international law experts that the US-Israeli attacks on Iran come in violation Article 2(4) of the UN Charter. And yet neither the United States nor Israel seem interested in justifying their actions in terms of their legality (unlike their “middle power” allies, who are intent on using the language of “collective self-defence”). In its place are assertions of power, of unassailable might, of moral legitimacy, of “good and evil”, of an “intolerable threat” posed by Iran.

The casual way that international law has been cast off in the conflict that is spreading across the Middle East raises pressing and pertinent questions about the moral considerations that undergird international law itself.

Guest: Tamer Morris is a Senior Lecturer at the University of Sydney, where he focusses on international law, United Nations peacekeeping and international humanitarian law. You can read his penetrating article on the illegality and (il)legitimacy of the Iran war on ABC Religion and Ethics.