TECHNOLOGICAL revolutions are best appreciated from a distance. The great inventions of the 19^th century, from electric power to the internal-combustion engine, transformed the human condition. Yet for workers who lived through the upheaval, the experience of industrialisation was harsh: full of hard toil in crowded, disease-ridden cities. The modern digital revolution—with its hallmarks of computer power, connectivity and data ubiquity—has brought iPhones and the internet, not crowded tenements and cholera. But, as our special report explains, it is disrupting and dividing the world of work on a scale not seen for more than a century. Vast wealth is being created without many workers; and for all but an elite few, work no longer guarantees a rising income.