This is a philosophical book about what the future of mankind will bring.  The author discusses many of the latest trends in science and technology, and warns of the consequences of misusing and abusing the knowledge we’re acquiring.  I appreciated his argument for the better treatment of animals, and his comments on smartphones, antidepressants, and longevity were thought-provoking and compelling, but a lot of the book is dense and heavy, and covers topics not particularly interesting to me.  It’s amazing how much he covers, and the book is definitely thoughtful and entertaining. I suspect it would have resonated more if I had read Sapiens first, but still, it’s a fascinating read.