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. >> that's. let's start with a long view that shows just how dramatic the change inaugurated by the modern revolution in innovation has been.

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 what happens over the next 500 years. basically, global gdp just flat lines. there's no change at all. then the trading capitals of europe start to kind of light up and you begin to see this slow but steady growth for the next 300 years. but then stop the clock right here. it's 1800, the dawn of the industrial age, steam power is starting to revolutionize life in britain, united states and britain. look what happens ov

. >> reporter: steven johnson is grant's uncle. grant was shot dead at 17 by then officer mehserle. johnson says two gathering planned sunday will be peaceful. downtown business have heard that before. >> i'm not expecting anything. i hope nothing will happen. >> reporter: iman gate's store was spared a broken window last time. other business such as foot locker say they are not prepared for the sunday rally, gates say the feel this time is different. >> before they used to have like posters around with grant pictures. >> reporter: but not this time. >> not this time, we don't see anything. >> reporter: the association says it will maintain it's daily patrols and monitor the situation. mayor quan says she expects the gathering to be small. >> we are planning for any possible event and we'll be on alert in case. >> reporter: several of the business i talked to said they were not even aware of the rallies on sunday. as that day approaches their preparations may change. in oakland, ken pritchett ktvu channel 2 news. >>> tonight san francisco firefighters will be united in reflection an

yet when he dealt with steven hadley, his national security advisor, hadley asked him "are we going to get stuck in afghanistan and iraq the way johnson was stuck in vietnam?" and george bush said "you can count on it, we will never be in that position again. and yet he was. >> woodruff: so maybe it will have a permanent hold on american leaders? >> i think it probably will because it is sort of the lost war and it carries a lot of emotional weight. >> woodruff: back to my original comment, the father and daughter, what's it like, marvin kalb and deborah cam working together father and daughter? >> i'll leave it to debbie. >> woodruff: we've seen husband collaborations what about this? >> this has been a wonderful experience. my father is a great journalist, he's a great person and i've learned an incredible amount. i think you feel like when you're in your 40s like i am that it's a special privilege to work with someone from an older generation who you can learn so much from. especially when he's your father. >> and my lesson on the whole thing is make sure that you t daughter you work for a debbie. (laughs) >> woodruff: great lesson