I'm quite worried about the fiscal imbalances that we've got and what that might mean in terms of financial crisis ahead.
By 2035, there will be almost no poor countries left in the world.
It's fine to celebrate success but it is more important to heed the lessons of failure.
For Africa to move forward, you've really got to get rid of malaria.
Setting clear goals and finding measures that will mark progress toward them can improve the human condition.
Microsoft has had many, many successful products. I'm committed to one company. This is the industry I've decided to work in.