Decades from now, people will look back and wonder how societies could have acquiesced in a sex slave trade in the twenty-first century that, as we’ve seen, is bigger than the transatlantic slave trade was in the nineteenth. They will be perplexed that we shrugged as a lack of investment in maternal health caused half a million women to perish in childbirth each year. – Half the Sky, Nicholas D. Kristof and Sheryl WuDunn