Kristof and WuDunn don’t want to suggest that the U.S. deserves any self-righteous sense of superiority, because many of the humanitarian problems discussed in
Half the Sky also exist in the U.S. But, their book focuses on the developing world. The authors assume that readers will see both 18th century slavery and 19th century totalitarianism as destructive conditions that led to great human rights violations. By placing the “struggle for gender equality” as the corollary moral challenge of our century, they stress the historic gravity of this struggle.