That's our mirror. Every dip, every crash, every bubble that's burst, a testament to our brilliant stupidity. This one gave us the railroads. This one the Internet. This one the slave trade. And if we hope to do anything about saving the environment, or getting to other worlds, we'll need a bubble for that too. Everything I've ever done in my life worth anything has been done in a bubble: in a state of extreme hope and trust and stupidity.