 When I sat down to write That Used to Be Us in 2011 with Michael Mandelbaum, the first thing I did was go back and get the first edition of The World is Flat off my bookshelf, just to remind myself what I said. And I started that book in 2004. So I opened it up to the index. I looked under A, B, C, D, E, F, F, A, F, A, C. Facebook wasn't in it.