50 years from now we won't need as much human labour to do what manual workers do, so we should be able to take that extra productivity and put it to better use.

The key thing you can do to reduce population growth is actually improve health.

I agree with people like Richard Dawkins that mankind felt the need for creation myths. Before we really began to understand disease and the weather and things like that, we sought false explanations for them. Now science has filled in some of the realm – not all – that religion used to fill.

Research shows that there is only half as much variation in student achievement between schools as there is among classrooms in the same school. If you want your child to get the best education possible, it is actually more important to get him assigned to a great teacher than to a great school.

There is a certain responsibility that accrued to me when I got to this unexpected position.

Contraception really shouldn't be all that controversial because it's a tool a woman can use to delay her first birth until she's, say, 18 or 19 years old.

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.