kind of thing or very much a family thing where we're special. >> absolutely. and -- or the nigerians here are disproportionately to very successful groups in nigeria with a proud royal heritage. what's interesting the second quality is, insecurity, which seems like the opposite of a sense of exceptionality and insecurity we mean, you know, a feeling you haven't quite done enough, not quite good enough, and the third is, impulse control. and the crux -- >> you know a lot about psychology, it's based -- the most famous experiment that they've done with children about the marshmallow. >> the marshmallow test. >> describe it. >> famous experiment done 30 years ago. you give kids a trea treat, marshmallow, a piece of -- something they like, and you ask them to see if they can wait 15 minutes before they eat it. tell them if you do wait, you'll get a second one. the question was, do they wait