In Facebook, Mark Zuckerberg built not just a business, but a company culture with the fervor of a messianic sect. So, in June 2011, when Google launched Google Plus, Zuckerberg put his company into lockdown. In an adaption from his new book on Silicon Valley, former Facebook employee Antonio García Martínez describes the war that followed.
Fascinating reading. It seems natural that, although in the real world nobody cared for G+, Facebook was worried.