The competition to hire the best will increase in the years ahead. Companies that give extra flexibility to their employees will have the edge in this area.

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

By improving health, empowering women, population growth comes down.

The nuclear industry has this amazing record, even equipment from generations one and two. But nuclear mishaps tend to come in these big events - Chernobyl, Three Mile Island, and now Fukushima - so it's more visible.

I'm a big believer that as much as possible, and there's obviously political limitations, freedom of migration is a good thing.

I believe that if you show people the problems and you show them the solutions they will be moved to act.

The spread of online information isn't just good for charities. It's also good for donors. You can go to a site like Charity Navigator, which evaluates nonprofits on their financial health as well as the amount of information they share about their work.