The biggest pieces of work that we do are vaccines, because those save lives, and also family planning. Because if a woman can space the births of her children, it changes everything for her health and her child's health.

We started our foundation because we believe we have a real opportunity to help advance equity around the world, to help make sure that, no matter where a person is born, he or she has the chance to live a healthy, productive life.

Even in our own agriculture strategy, if we got a great new drought-resistant seed and we managed to get it distributed in the system, we just assumed that it would reach female farmers. That's a false assumption, because women don't interact with agro-dealers. So if you don't develop specific programming to ensure that seed gets in a woman's hands, then the extra income [generated by higher-yielding crops] goes into her husband's hands.

When we invest in women and girls, we are investing in the people who invest in everyone else.

After a number of years dating, we decided we were good partners.

Connect deeply with others. Our humanity is the one thing that we all have in common.

In the developing world, it's about time that women are on the agenda. For instance, 80 percent of small-subsistence farmers in sub-Saharan Africa are women, and yet all the programs in the past were predominantly focused on men.