I have to say that I expected something slightly different from this book, perhaps due to the subheading „Being human in the age of Artificial Intelligence“. But as Tegmark is a professor of physics i should have known better. While Tegmarks insights are often quite fascinating, the ideas in the book often seem too far-fetched. Its Tegmarks secret sauce to watch everything through the eyes of hard sciences (e.g. in his book „Our Mathematical Universe“), but applying only the constraints of physics to the future of AI and mankind creates some shallow and anaemic narratives. Frightening at times, as well. Worth reading, tho. I really support his futureoflife.org initiative.