Design, at its heart, is about solving problems. That’s why it’s so easy to talk to designers. They can explain exactly how their interface is built to help you navigate through your phone, or how a device was shaped to make it possible for mass manufacturing on the assembly line.But over the course of hundreds of conversations with designers, I’ve begun to wonder: If most people’s goal is to live a happy life, why did I never hear designers explain how they’d built something to make me happy?