When people gain income, they gain choice, and that is fundamental to dignity.

Sometimes the most important things that we do are things we cannot measure.

When we were walking through the narrow alleys [of the Mathare Valley slums], it was literally impossible not to step in the raw sewage and the garbage alongside the little homes. But at the same time it was also impossible not to see the human vitality, the aspiration and the ambition of the people who live there.

My dream is to find individuals who take financial resources and convert them into changing the world in the most positive ways.

There are cases where government-to-government aid actually has worked. Look at the eradication of smallpox and the near eradication of polio. But these are really top down solutions that require government-to-government support and aid.

Poverty is too complex to be answered with a one-size-fits-all approach, and if there is any place that illustrates that complexity, as well as a better way forward, it is Rwanda.

In today's world, the elites are growing even more comfortable with one another across national lines, yet at the same time, less comfortable with low-income people who share their nationality. How we create those bonds of community that are truly global as well as national is one of our generation's great challenges.