Venture to a pro-Palestinian rally at one of Australia’s capital cities, and you’ll invariably hear calls to “end the genocide” in Gaza.

And in the international court of justice, South Africa has accused Israel of committing genocide as well. It’s a claim Israel strenuously denies.

So what is a genocide?

And what evidence is needed to prove that one is happening?

Today, we bring you a special episode with Geoffrey Robertson, KC, a former United Nations war crimes judge and now a human rights barrister and author, who tells us why this case will become the definitive decision on genocide.