Hi Jeff, Thanks again for making the time for me last time you were in town. And for your introductions to Brockman and Ehud. I have enjoyed all the conversations and been learning a lot. Hopefully, a book or two will come out of it eventually as well. Means a lot to me. Martin mentioned that you are thinking about the top questions in various fields and suggested I might think of some of my own and pass them on to you. In case you are interested, I list below the five biggest questions that keep me up at night, motivate my life's work, and which I think ought to keep up every social scientist. Happy to discuss with you, if and when you are