Vanity Fair has run some excerpts from an upcoming book by a former employee that gives insight on how things work at the social network. The chapter, among other things, details Facebook CEO Mark Zuckerberg's actions when Google launched its own social networking service Google Plus. The extract finds Zuckerberg's behaviour so intense that it calls it "bordered on the psychopathic." It reads: [...] hit Facebook like a bomb. Google Plus was the great enemy's sally into our own hemisphere, and it gripped Zuck like nothing else. He declared "Lockdown," the first and only one during my time there. As was duly explained to the more recent employees, Lockdown was a state of war that dated to Facebook's earliest days, when no one could leave the building while the company confronted some threat, either competitive or technical.â [...] Rounding off another beaded string of platitudes, he changed gears and erupted with a burst of rhetoric referencing one of the ancient classics he had studied at Harvard and before. "You know, one of my favorite Roman orators ended every speech with the phrase Carthago delenda est. 'Carthage must be destroyed.' For some reason I think of that now."