Globally, there are 65 million girls not in school. Instead, 1 in 3 girls in developing countries are married before the age of 18, and 1 in 9 are married before the age of 15. And 2 in 3 illiterate people are female.
If all women had a primary education, 1.7 million children would be saved from stunting from malnutrition. If all women had a secondary education, 12 million children would be saved from stunting malnutrition.
The resulting gender inequality and economic stagnation affects everyone.
But education can change everything.
If all girls completed secondary school:
Data from UNESCO's Education for All Global Monitoring Report, at http://en.unesco.org/gem-report/sites/gem-report/files/girls-factsheet-en.pdf, from the International Center for Research on Women, at https://www.icrw.org/child-marriage-facts-and-figures/, and from UNICEF, at https://www.unicef.org/education/bege_70640.html