will say it is wall street caused the financial crisis. it is much more complicated. what i want her to understand is that capitalism has been the greatest engine, the greatest driver for prosperity in the history of the world and there's a lot of examples of that in there. maybe you can find some times in history where you have boom and bust periods, greed followed by fear. we know how that works. but, compared to any other system, a lot of the great things we take for granted cape as a result of free markets and capitalism. >> greta: what is fun about the book are the conversations. blake's conversations. was there one particular conversation, i've gotta step in, i want to write this, because schools are maybe teaching it the wrong way? >> if i had to point to one thing, i guess it would be -- she is a little girl, loves the environment. she is an environmental eagle, she guess to the arboretum.