The World Health Organization (WHO) has defined health as "a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity." Identified by the 2012 World Development Report as one of two key human capital endowments, health can influence an individual's ability to reach his or her full potential in society. Yet while gender equality has made the most progress in areas such as education and labor force participation, health inequality between men and women continues to harm many societies to this day.