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starbucks espresso with a hint of cream. so you can put your energy, where it really counts. starbucks doubleshot espresso. energy. (applause). >> trevor: welcome back to the daily show. my guest tonight is a maks arthur general err genius, professor of neur science, and author of his latest book called behave, the humans at our best and worst. please welcome robert sapolsky. welcome to the show, professor. >> thank you. >> trevor: what i have always enjoyed about you, we met awhile ago, was that you look like a professor. i like that. >> it was a requirement. >> trevor: yeah. you've got a professor face. i enjoy that about you. and what a time to have you on. let's talk about this back, behave, the biology of humans at our best and at our worst. this was ten years, this book took you ten years to write. and despite being a pes mist you have confessed that you have learned what gives you optimism is basically that there is an idea that we can learn about how to better the human condition, how we can get human beings to do the right thing as opposed to the wrong thing. how did you get to that conclusion? >>