Homo Deus, by Yuval Noah Hariri, is as consequential a read as Ray Kurzweil's Age of the Spiritual Machine. Whereas Kurzweil presented all the benefits of Artificial Intelligence, as well as the mathematical inevitability of superintelligence, Hariri raises the question of what to do with the mass of unenhanced humans who will soon be out of a job. Anyone who thinks about the social contract needs to be aware how the preferred role of people is about to get hammered by a wave of networked superintelligence.