This first update of the Women, Peace, and Security (WPS) Index provides important insights into patterns and progress on women’s well-being and empowerment around the world. It reflects a shared vision that countries are more peaceful and prosperous when women are accorded full and equal rights and opportunities. While just two years have passed since the inaugural WPS Index was published, major insights can be drawn from recent trends. The timing of this report offers opportunities for stakeholders to review and discuss challenges and to identify opportunities for transformative change in advance of the 20th anniversary of United Nations Security Council Resolution 1325 on Women, Peace and Security. The WPS Index incorporates three basic dimensions of women’s well-being—inclusion (economic, social, political); justice (formal laws and informal discrimination); and security (at the family, community, and societal levels)— which are captured and quantified through 11 indicators. The indicators are aggregated at the national level to create a global ranking of 167 countries.