From two of our most fiercely moral voices, a passionate call to arms against our era's most pervasive human rights violation: the oppression of women and girls in the developing world. With Pulitzer Prize winners Nicholas Kristof and Sheryl WuDunn as our guides, we undertake an odyssey through Africa and Asia to meet the extraordinary women struggling there, among them a Cambodian teenager sold into sex slavery and an Ethiopian woman who suffered devastating injuries in childbirth. Drawing on the breadth of their combined reporting experience, Kristof and WuDunn depict our world with anger, sadness, clarity, and, ultimately, hope. They show how a little help can transform the lives of the women and girls. Through these stories, we see that the key to economic progress lies in unleashing women's potential. Countries such as China have prospered precisely because they emancipated women and brought them into the formal economy. Unleashing that process globally is not only the right thing to do; it's also the best strategy for fighting poverty.