It's a strange thing, this book. The author has copious amounts of very interesting research to share with us on many aspects of human development and interaction, but for some reason chooses the jarring method of shoehorning those facts into a novel. The science parts of the book are fascinating, clearly written, and thought-provoking, but sometimes these are then let down by the perfunctory attempts at creating a narrative in order to convey them. It's not necessary and reminds me of when bad thriller writers are desperate to share their research with is on the minutiae of everything ("Brad removed the Austrian made Glock from the glove compartment, thinking of how far the pistol had come from the town of its manufacture 15 kilometres north east of Vienna" etc).
Books like 59 Seconds, Freakonomics and The Survivors Club show that you don't need to hide science in fiction to get your point across. So it's five stars for the facts, reduced to four by the format.