In the same way that when the car got going, people thought it would be an electric car, people thought it would be a steam car. Actually, the dark horse in that race was internal combustion, but because of the energy density of gasoline and discovery of oil in large amounts at that point in first Pennsylvania and then Texas, it won out over those other two, to the point that those other two are actually viewed as obscure footnotes in history.

In the next 15 years, we can halve childhood deaths. That's doable.

Well, I don't think there's any need for people to focus on my career.

I can understand wanting to have millions of dollars; there's a certain freedom, meaningful freedom, that comes with that.

Helping convene global stakeholders to establish a set of measurable, actionable and consensus-built goals focused on extreme poverty is invaluable.

Investing in innovation, which was my broad theme talking to [Warren Buffett ], that included health vaccines, it included energy and education.

I have to say that in 1981, making those decisions, I felt like I was providing enough freedom for 10 years. That is, a move from 64k to 640k felt like something that would last a great deal of time. Well, it didn't - it took about only 6 years before people started to see that as a real problem.