Imagine if he had resigned in protest at the decision to push for the invasion of Iraq. He would now be hailed as a hero around the world. Instead, he didn’t. What a waste of an exceptional career.
He would have faded into obscurity and we would all be talking about how terrible his replacement was for lying to the UN.
Textbooks a century from now will include his name. It could have been in a positive light, but now his name will be forever tarnished.