In the nineteenth century, the central moral challenge was slavery. In the twentieth century, it was the battle against totalitarianism. We believe that in this century the paramount moral challenge will be the struggle for gender equality around the world.

We all might ask ourselves why we tune in to these more trivial matters and tune out when it comes to Darfur

Neither Western donor countries like the U.S. nor poor recipients like Cameroon care much about Africans who are poor, rural and female

I think it's dangerous to be optimistic.

Solar power is one of the most hopeful technologies but still produces about 0.01 percent of U.S. electricity. The U.S. allocates just $159 million for solar research per year - about what we spend in Iraq every nine hours.

The greatest threat to extremism isn't drones firing missiles, but girls reading books.

It's important not to demonize [Donald's] Trump voters.