"The problem with Saddam Hussein was that as a maverick you couldn't predict what he would do. Sponsoring terrorism was definitely on his agenda as it was. Doing nothing with Iraq was a problem of proportions we can no longer quantify, but it would have been big."

Actually, Hussein was entirely predictable - he was a thug who wanted to survive. Please don't trot out that tired old canard about "sponsoring terrorism". His biggest crime was the unprovoked invasion of Iran, goaded on and armed by West, which cost a million lives.

Regarding what we can and cannot quantify, by latest estimates 1 million deaths and several million refugees have resulted from the US/British invasion of Iraq.