They make a great point about the difference between 19th and 20th century industrial revolutions. In the 19th century, unskilled laborers became more producti

They make a great point about the difference between 19th and 20th century industrial revolutions. In the 19th century, unskilled laborers became more productive, and skilled artisans less productive, due to machinery making their jobs easier (hence the Luddite movement). In the 20th century the situation reversed, and unskilled laborers had their jobs taken and perhaps eliminated by full automation. Productivity went down for them and up for the people who owned the machines. The well known concern for the 21st century is that as automation becomes more capable, it will raise the skill floor of human employability, which can only increase inequality (of productivity and thus life, thanks capitalism).