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 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.

It's no accident that the countries that have enjoyed an economic take off have been those that educated girls and then gave them the autonomy to move to the cities to find work

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 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.

When the history of African development is written, it will be clear that a turning point involved the empowerment of women.

We all have won the lottery of life. How do we discharge that responsibility?

In the same way that slavery was a moral challenge for the 19th century and totalitarianism was a challenge for the 20th century, the challenge that women and girls face around the world is the moral challenge of our time.

One of the ways to be happy, to be truly happy, is to contribute to a cause that is greater than yourself. And, through Harvard-based research, we can see that happy people live longer.