South Africa’s Archbishop Desmond Tutu has called for former UK Prime Minister Tony Blair and former US President George W Bush to face trial at the International Criminal Court (ICC) in the Hague over the Iraq war.

Tutu, who won a Nobel peace prize for his fearless campaigning against apartheid, on Sunday accused the two men of lying about Iraq's weapons of mass destruction and said the ensuing war had made the world more unstable “than any other conflict in history”.

How realistic is Tutu's call to action? Seeing both leaders hauled in front of the Hague may be some time away – not least because the US has controversially refused to sign up to the treaty which created the International Criminal Court. But loud calls for justice from respected leaders like Tutu aren't just shouts in the dark. There's the embarrassment caused by the media spotlight, for a start. And it can cause a major inconvenience with travel plans.

But above all, it sends a message to other leaders: the world remembers, the world cares, and the world is watching. Add your voice to that message by sharing this story with everyone you know.