From 1965 to today, the proportion of men who have dropped out of the workforce has more than tripled since 1965. If you look at that proportion over time, it's almost a straight line. You can't tell when the recessions occurred or when there were boom times. You can't tell when China entered the World Trade Organization to disrupt trade. You can't tell about our fascinating little disruptive devices like iPhones. It almost looks like a geological force. There are, obviously, some big, powerful dynamics at work that account for all of this, and they're not entirely well explained by our regular economic received wisdom.