Natural selection, as it has operated in human history, favors not only the clever but the murderous.
Presidents with strong nerves are decisive. They don't balk at unpopular decisions. They are willing to make people angry. Bush had strong nerves. Clinton, who passed up a chance to eliminate Osama bin Laden, did not. Obama is a people pleaser, a trait not normally associated with nerves of steel.
You never really understand a person until you consider things from his point of view.

