If leaders may lie, then who should tell the truth? Days before George W Bush and Tony Blair ordered the invasion of Iraq, I called the White House and spoke to Condoleezza Rice, who was then national security adviser, to urge that United Nations weapons inspectors be given more time to confirm or deny the existence of weapons of mass destruction in Iraq. Should they be able to confirm finding such weapons, I argued, dismantling the threat would have the support of virtually the entire world. Ms Rice demurred, saying there was too much risk and the president would not postpone any longer.

On what grounds do we decide that Robert Mugabe should go the International Criminal Court, Tony Blair should join the international speakers’ circuit, bin Laden should be assassinated, but Iraq should be invaded, not because it possesses weapons of mass destruction, as Mr Bush’s chief supporter, Mr Blair, confessed last week, but in order to get rid of Saddam Hussein?

The cost of the decision to rid Iraq of its by-all-accounts despotic and murderous leader has been staggering, beginning in Iraq itself. Last year, an average of 6.5 people died there each day in suicide attacks and vehicle bombs, according to the Iraqi Body Count project. More than 110,000 Iraqis have died in the conflict since 2003 and millions have been displaced. By the end of last year, nearly 4,500 American soldiers had been killed and more than 32,000 wounded.

On these grounds alone, in a consistent world, those responsible for this suffering and loss of life should be treading the same path as some of their African and Asian peers who have been made to answer for their actions in the Hague.