Sam Kass recommended this book in the 'Tools of Titans' book.

Ray Dalio mentioned this book on 'The Tim Ferriss Show' podcast.

"Best book I've read in [2015]."

"Fascinating because of its multi-disciplinary approach towards understanding human society, our behaviour and our future."

"A great book about [how] we’ve evolved and why we have anxiety."

"It explains human behavior and why we are the way we are in human civilization from soup to nuts. And I’ve read it now a couple of times. It’s a pretty astonishing book."

"I got this book at an airport and it's truly the best decision I've made. This is one thorough book about the history of human existence. It was really nice to be re-informed about the history and the existence of homosapiens."

"I’m going to give [this book] over and over again to everyone I know."

One of Peter Attia's answers to 'any books you feel would make your reading list?'

"It really puts in perspective how bizarre human beings are. It’s an awesome overview of our species."

"I would recommend this book to anyone interested in a fun, engaging look at early human history."

"A grand theory of humanity."

"A previous favorite."

Keith Rabois recommended this book on a Medium blog post.

Melinda Gates recommended this book on Likewise.com.

"Basically one of the things we've created here is we've imagined ideas that we all share."

One of Ryan Shea's 4 answers to 'what is the book (or books) you’ve given most as a gift?'

"The brainy book I seem to be sharing or talking about the most lately."

"I just love the style of his writing."

"A big history narrative of human civilization."

"Both sobering and conservatively optimistic in equal measure, it seems even more relevant for us at the moment to learn from our socio-anthropological history."

"There's not many times where I read a book and come out with 20 new ideas I hadn't thought about before, and [this book] made me think like that."