Madeleine Leininger was a nurse and anthropologist who developed the Culture Care Diversity and Universality Theory. The theory proposes that nursing care should be provided in a culturally congruent manner. It aims to increase cultural awareness among nurses and incorporate a patient's cultural values, beliefs, and practices into their care plan. The theory also recognizes that while cultures differ in some ways, they also share universal concepts of care that are essential to health and well-being.