Credit where it's due: learnt about this book in an edge.org conversation[2] between Dr. Harari and the eminent psycologist Daniel Kahneman.
Speaking of professor Kahneman, I recently finished his "Thinking, Fast and Slow" (I did notice it's mentioned in the comments, but still), over a period of deliberate slow reading of 5 months. Much has been said and written (more than well deservedly!) about this book. Don't let the title invite you to dismiss it off as yet another over-simplifying popular psyocology book; it's anything but that. It is an account of about 30 years of collaboration with his late colleague Amos Tversky. Certainly not a breezy page-turner. It's well worth it to take your own time to assimilate the content.
[1] http://www.ynharari.com/sapiens-the-book/short-overview/
[2] http://edge.org/conversation/yuval_noah_harari-daniel_kahneman-death-is-optional