What does money tell us about human nature? How does it motivate, trick, satisfy and disappoint us? In this hour, TED speakers share insights into our relationship with money. Psychologist Laurie Santos studies human irrationality by observing how primates make decisions — including some not-so-savvy money choices their human relatives often make. Behavioral economist Keith Chen says languages that don’t have a future tense strongly correlate with higher savings. Social psychologist Paul Piff describes how almost anyone’s behavior can change when they’re made to feel rich. Career analyst and writer Daniel Pink explains why traditional rewards like money aren't always successful motivators. Social scientist Michael Norton researches how money can buy happiness — the key is social spending that benefits not just you, but other people.