Frey goes on a tour of technological change since the industrial revolution and its impact on labor markets and society more broadly. What becomes clear is just how common technological disruption has become, as well as how long it typically takes for benefits to percolate to society and for larger productivity/earnings gains to be realized. Better technology, in short, does not guarantee better earnings absent government and labor pressure. Frey does get a bit techno-determinist, and the book overall is very US and UK focused. This is, however, the best book I've seen on this topic. Highly recommend