Each week, a different HBR editor talks to world-class scholars and experts on influential business and management ideas of HBR’s first 100 years: disruptive innovation, scientific management, shareholder value, and emotional intelligence. Each Thursday in October, join us right here in the HBR IdeaCast feed for a bonus series: 4 Business Ideas That Changed the World. Each week, a different HBR editor will host a discussion with world-class scholars and experts on the most influential business and management ideas of HBR’s first hundred years.