Believers in central planning should take a look at Washington's Metro rail transit system. While they will find many things to like, they will also see examples of how central planners -- and especially rail transit planners -- can get things disastrously and expensively wrong.

Here are a couple of things to keep in mind about Newt Gingrich, as he leads in polls for the Republican presidential nomination nationally and in Iowa and South Carolina and may be threatening Mitt Romney's lead in New Hampshire. One is that he is an autodidact. A second is that he has incredible perseverance.

America's version of capitalism has been much more dynamic than Europe's. Why don't Obama and Romney debate that?

What is imagination? How does it work and what effects does it have on human lives and human communities?

If we want to improve U.S.intelligence, then we should fire the failures, get individuals to take responsibility for analyses, and reward independent thinking.