"One of my favorite recent books."

Stewart Brand recommended this book on his 'Selected Books for the Manual for Civilization' blog post.

"Takes a long view and shows the long-term decline in violence that has occurred."

"Encouraged the better side of ourselves."

"One of the most important books I’ve read—not just this year, but ever."

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

"About how and why violence has steadily decreased throughout our history, and how we can continue this trend."

"For studying excellence."

"Traces the history of violence and how we are in the safest time ever."

"[I recommend] anything [by this author]. He’s one of the clearest thinkers and communicators of our time."

"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."