If you want to lift up an economy in Africa, you basically start with the women.

If you ask, who has the chance to move into the city and get a good job out in the developing world? It's a man. Who's left to care for the kids back at home? The woman is.

In the developing world, they don't have smartphones yet. They have the older plastic phones, but women are saving money on those, because they don't have access to banks. Having that access to digital money changes everything for her because she actually doesn't have to negotiate with her husband, which she will tell you is very hard in these circumstances, especially when the means are meager. She's expected to have money to pay for the kids' health or to help with the school fees.

Women speaking up for themselves and for those around them is the strongest force we have to change the world.

I'm wholehearted about whatever I do.

I'm constantly saying to myself, 'I'm lucky I was born in the United States.

Women and girls should be able to determine their own future, no matter where they're born.