It's not his undoubted powers of persuasion that have swayed me, nor the motorcade factor which clinched it for David Miliband, who claims that no one else could stop the traffic in Beijing or Washington or Moscow). I have a different interest. [...] Blair has the distinction, which is a source of national pride in some quarters, of being one of the two greatest living mass murderers. That he commissioned a crime of aggression (waging an unprovoked war, described by the Nuremberg Tribunal as "the supreme international crime") looks incontestable. [...] Within the UK, there is no means of prosecuting Mr Blair. In 2006 the law lords decided that the international crime of aggression has not been incorporated into domestic law. But elsewhere in the world it has been.
Basically, the point is that Blair, in that position, would have to travel to countries where the crime has been incorporated into domestic law, and that people would know when he does.
Clearly, the only place for Blair is in prison. How to get him there is the tricky bit. Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi
The other being Bush, I suppose? Surely there are worse mass murderers in the Congo that both of these (probably more than 4 million killed over the last decade).