"Traces the history of violence and how we are in the safest time ever." - A.J. Jacobs
"Takes a long view and shows the long-term decline in violence that has occurred." - Ben Silbermann
"One of the most important books I’ve read—not just this year, but ever." - Bill Gates
"[I recommend] anything [by this author]. He’s one of the clearest thinkers and communicators of our time." - Chris Anderson
"When you finish [this book], which takes a long time, you conclude that the world is in a much, much better place than it has been in the past." - Eric Schmidt
"One of my favorite recent books." - Jack Kornfield
One of John Arnold's answers to "what is the book (or books) you’ve given most as a gift?"
"Encouraged the better side of ourselves." - Lex Fridman
"About how and why violence has steadily decreased throughout our history, and how we can continue this trend." - Mark Zuckerberg
Stewart Brand recommended this book on his "Selected Books for the Manual for Civilization" blog post.
"So good. I've found it to really rock people's preconceived notions on a number of topics." - Anthony Pompliano
"Blew my mind." - Penn Jillette