It is now widely accepted that diverse groups generate more innovative ideas than homogenous ones. But diversity alone is meaningless without an inclusive culture that values and actively encourages diversity of thought. New research shows that senior leadership is the biggest enabler of innovation and that diversity of thought is the spark that ignites it. Therefore, it is crucial for CEOs and chief strategy officers to champion an inclusive culture. This report features interviews with experts and in-depth case studies from AT&T, Saint-Gobain Performance Plastics (SGPPL), DBS (formerly the Development Bank of Singapore), and Kaiser Permanente.