I agree with others that this book raises interesting questions and definitely gets you thinking. But he really scratches the surface on many of his ideas. It serves as a good conversation starter but you need to look elsewhere if you want to look in-depth into the ideas he raises.
I also don't like Harari's overly pessimistic view on things. Our society can go in so many directions. He talks as if homo sapiens time on earth is basically done within a century. He could be right but his theories aren't any more valid than others. He's written a pithy book that is getting attention but other views are out there.
Worth a read.