Harari wrote Homo Deus: A Brief History of Tomorrow as a sequel to his earlier book, Sapiens: A Brief History of Humanity. After looking at what made humans stand out in the first place (Sapiens), Harari turns his attention to the future and the likely attempts to upgrade humans into gods. What may seem impossible today (immortality, complete control over mood) might become possible in the future. The pace of technology and the prevalence of immersive data systems like Google is changing how humans relate to the world and challenging beliefs about the value of humans in the first place. Will all jobs be replaced by robots? Will the world be run by a class of upgraded super-humans? What will we do if this happens? By looking at history to predict the future, these are the questions that Harari answers.

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