In recent decades, women's and girls' education and health levels have improved greatly. But in many parts of the world, women are still dying in childbirth, or not being born at all, at alarming rates. Women continue to lack voice and decision-making ability in the household and in society; and, their economic opportunities remain very constrained. This inequality is manifestly unfair. It is also bad economics: under-investing in girls and women puts a brake on poverty reduction and limits economic and social development.