It's amazing how ideas with no merit become popular merely because they sound good. Most every politician and pundit says "energy independence" is a great idea. Presidents have promised it for 35 years. Wouldn't it be wonderful if we were self-sufficient, protected from high prices, supply disruptions and political machinations? The hitch is that even if the United States were energy independent, it would be protected from none of those things. To think otherwise is to misunderstand basic economics and the global marketplace. To be for "energy independence" is to be against trade. But trade makes us as safe. Crop...