Today, all Americans are told, "Go to college!" President Obama said, "College graduation has never been more valuable." But economist Bryan Caplan says that most people shouldn't go. "How many thousands of hours did you spend in classes studying subjects that you never thought about again?" he asks. Lots, in my case. At Princeton, I learned to live with strangers, play cards and chase women, but I slept through boring lectures, which were most of them. At least tuition was only $2,000. Now it's almost $50,000. "People usually just want to talk about the tuition, which is a big deal,...