Our list of the ten richest, based on scholarly estimates and adjusted for inflation, includes entrepreneurs, warriors, and robber barons. We did not include monarchs, whose vast wealth is considered public.
Bill Gates, Warren Buffett, and Carlos Slim are the only living men who crack the list -- and that's only counting their net worth at bubble peaks in 1999 and 2007.
#9 Richard Fitzalan 10th Earl of Arundel
Peak fortune: $108 billion
Source of wealth: The Earl of Arundel and quite the military leader. He fought in the Scottish Independence wars and in the Hundred Years’ War. Subsequent Earls of Arundel — his sons — would make this list, but we’re only counting that money once.