![HBR IdeaCast show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/923/small/hbr-ideacast.jpg)
Summary: John Elkington, founder and chief entrepreneur of SustainAbility and coauthor of "The Power of Unreasonable People."
Summary: John Elkington, founder and chief entrepreneur of SustainAbility and coauthor of "The Power of Unreasonable People."