A few days later, when I meet with Zuckerberg for our first conversation, he’s eager to talk about Oculus Ping-Pong even before I begin asking him questions. As he delineates the pleasures that user-adjustable physics bring to table tennis, his expression takes on some of the same goofy glee I’d experienced. (Zuckerberg, a gamer himself, is a devotee of Civilization, a venerable game series that Oculus CEO Brendan Iribe worked on in a previous life. The goal of the original 1991 version of Civ—"build an empire to stand the test of time"—neatly encapsulates its appeal to the Zuckerbergian brain.)