Mark Zuckerberg surprised a council of top Facebook executives in July 2018 by declaring: "Up until now, I’ve been a peacetime leader ... That’s going to change."
Driving the news: The account appears in a closely held book that'll be out Tuesday, "An Ugly Truth: Inside Facebook’s Battle for Domination," by the N.Y. Times' Sheera Frenkel and Cecilia Kang.
