One useful way to think about Sun Tzu's The Art of War is that if offers a proven, well-organized system for thinking about the future, not only tomorrow, but the day after tomorrow. For example, after the Madrid bombings, about 10% of the voters reacted with fright, switching their votes from the conservative party to the socialist party. Impending economic disaster aside, what is it that these voters expect to happen. Alright, tomorrow, (after June) the Spanish will pull out of Iraq. What will happen after that?