Great ideas often come from a simple spark: A soccer player on the New Zealand national team notices all the unused wool his country produces and figures out a way to turn them into shoes (Allbirds). A former Buddhist monk decides the very best way to spread his mindfulness teachings is by launching an app (Headspace). A sandwich cart vendor finds a way to reuse leftover pita bread and turns it into a multimillion-dollar business (Stacy's Pita Chips). In this week's episode award-winning journalist and NPR host Guy Raz speaks to Carl Miller about uncovering the stories of highly successful entrepreneurs. To find out more about Guy's book click here: https://www.amazon.co.uk/How-Built-This-Unexpected-Entrepreneurs/dp/0358216761 Support this show http://supporter.acast.com/intelligencesquared.  See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit podcastchoices.com/adchoices