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). Award-winning journalist Guy Raz has interviewed more than 200 highly successful entrepreneurs to uncover amazing true stories like these. Based on the highly acclaimed podcast, "How I Built This".