Guy Raz, host and editorial director of TED Radio Hour , says we view our world through a series of prisms. If we re-frame our perspectives, we can recognize the possibilities. TED Radio Hour is the fastest growing program in radio history. It explores what it means to be human and new ways of thinking. Raz is also the host and creator of a new podcast, How I Built This , which looks at the a-ha moments and tipping points behind some of the most iconic businesses and brands .