We’ve spent decades studying the policies and practices around diversity, equity and inclusion (DEI), and there’s no question that building a culture where everyone thrives takes a high level of commitment and consistency. Our research finds that managers are the key to making it happen. From supervisors on the factory floor to department middle managers to senior executives in the corner office, leaders who work diligently to increase a sense of belonging and respect, remove bias, follow fair hiring and retention practices, and establish safe spaces for employees of all races, ethnicities, genders and abilities will find that workers don’t want to leave.