OCCUPATION: Saudi Arabian Oil Minister
PREVIOUS APPEARANCES ON THE TIME 100: 1
PRO: Perhaps the most powerful oilman in the world, al-Naimi must contend with dropping crude-oil prices, not to mention a U.S. President determined to move toward renewable resources (a shift al-Naimi warns could be a "nightmare scenario" if enacted too quickly).
CON: For all his dire warnings, it's going to be difficult to thwart Obama's war on fossil fuels.
Next Rupert Murdoch