do you think eric baker exists? >> too many opinions. >> sustained. >> at some point in the months before she wept missing her mom begins a galaxy of imaginary friends. eric baker jeff hopkins and his son cole. >> tell me about jeff hawkins? >> she said she thought he was a nice young man and he was a friend and she was confideling ing in him about her relationship with jessie. >> jeffery had a child named zachary? >> yes. >> did you ever see a photograph of zachary? >> i took a picture of zachary and jeffery on casey's cell phone. the picture was of zachary and jeff and she had him listed as boyfriend in her phone. >> who now can ever forget

eric schmidt, the head of the u.s. military's crack team of innovators, dr. regina dugan, author steven johnson, economist paul romer, len baker and innovation maven john kao. >> problems are much more serious than most people realize and the consequences are more grave than most people realize. >> but let's get started by first understanding innovation and watching the effect it has had on societies over the last centuries. >>> so, why does innovation matter? helping explain it all for us today is a man who studied innovation from top to bottom, steven johnson. johnson is the author of a terrific book "where good ideas come from: the natural history of innovation" and he'll show us the impact of innovation over time. >> thanks. let's start with a long view that shows just how dramatic the change inaugurated by the modern revolution in innovation has been. this is a charted of global gdp over the last 1,000 years, which is basically the kind of best way to measure the increase in value from new products and services created in a society. so, if we start the clock here at the year 1,000 n the middle of the dark ages and look at