There are more rich people and more poor people in our country than ever before. That widening gap means dealing with one big, uncomfortable truth: the middle is growing thinner and thinner. Globally renowned economist Tyler Cowen explains how this happened: high earners are taking ever more advantage of computers and achieving ever-better results. Meanwhile, low earners who haven't committed to learning the new technologies have poor prospects. Nearly every business sector relies less and less on manual labor for high-value jobs, and this fact is forever changing the world of work and wages. About 3/4 of the jobs created in the United States since the great recession pay