Mark Zuckerberg’s next Facebook book club pick is by Steven Pinker

Facebook CEO Mark Zuckerberg announced his second book club pick for 2015: Steven Pinker’s “The Better Angels of Our Nature: Why Violence Has Declined” published in 2011. The book argues that looking back at human history, violence is on the wane.

Zuckerberg has launched a book club on Facebook, A Year in Books, where he plans to read and discuss a new book every two weeks throughout 2015.

“Recent events might make it seem like violence and terrorism are more common than ever, so it’s worth understanding that all violence — even terrorism — is actually decreasing over time. If we understand how we are achieving this, we can continue our path towards peace,” Zuckerberg wrote. “A few people I trust have told me this is the best book they’ve ever read.”

Because Pinker’s book clocks in at more than 800 pages, Zuckerberg is giving readers a month to complete it. There are still plans to announce another book in two weeks, however.

More than 270,000 people have “liked” the Facebook book club, which indicates a broad reach.

But no one is quite sure how the numbers will play out. More than 1,500 “liked” a conversation with Moisés Naím, author of the book club’s first selection, “The End of Power,” on Facebook, but the conversation itself generated fewer than 200 comments.

Yet the selection did make a difference in book sales. “The End of Power” sold 13,000 copies after its selection, 10,000 of those as e-books.

Book news and more; I’m @paperhaus on Twitter