Not everything the authors try to do comes off. They introduce us to some characters to illustrate their points: Radhika, a college-educated Mumbai freelance worker, Tom, a Dallas truck driver, and others. But they are not fleshed out, so when their names come up it is hard to remember who they are. And Scott and Gratton chase after so many research papers that their narrative occasionally meanders. But their argument is robust and their themes sufficiently important to make this book essential reading for policymakers and chief executives.