Mackenzie King.... let's see what were his greatest accomplishments?

Hard to choose between hanging around for a long time, and boosting the awareness of the occult by communicating with is deceased mother via seances...

And to give you an idea what a big splash he made in history, I have seen at least two books, one on Churchill and the other on FDR which showed pictures from the Quebec conference and one other meeting were everyone in the photo was identified, down to military officers (presumably aides to either FDR or Churchill), except for one who was specifically referred to as 'unidentified' 

Wonder who that could be???