I have this very positive view of the world getting better and better. The list of things that could be huge setbacks is not very long: A nuclear war, climate change and epidemics.

China has many successful entrepreneurs and business people. I hope that more people of insight will put their talents to work to improve the lives of poor people in China and around the world, and seek solutions for them.

Like many others, I have deep misgivings about the state of education in the United States. Too many of our students fail to graduate from high school with the basic skills they will need to succeed in the 21st Century economy, much less prepared for the rigors of college and career. Although our top universities continue to rank among the best in the world, too few American students are pursuing degrees in science and technology. Compounding this problem is our failure to provide sufficient training for those already in the workforce.

I don't think culture is something you can describe.

Kenya’s M-Pesa proves that when people are empowered, they will use digital tech to innovate on their own behalf.

I believe it’s not only possible to eradicate malaria; I believe it’s necessary. Ultimately, the cost of controlling it endlessly is not sustainable. The only way to stop this disease is to end it forever.

Know your numbers' is a fundamental precept of business.