I told my father I had to try political science for a year. He thought I was throwing my life away.

For the private sector to flourish, special privilege must give way to equal opportunity and equal risk for all.

Saddam Hussein had nerve gas and used it against his own people, he had used chemical weapons against the Iranians and he almost had a nuclear bomb in 1981 and in 1991. And he had been caught with anthrax in 1995 by the UN inspections after denying that he had it.

The Western alliance should have supported the Sunni opposition against the Assad regime from the beginning. As far as Iraq is concerned, if it had stayed stable the way it was in 2008, IS would not have been able to expand in Iraq the way they did. The mistake was that Barack Obama withdrew the armed forces from Iraq too fast.

Islamic State is mainly a direct result of the failure in Syria. That's where IS has grown. That's where IS spread from.

I told my father I had to try political science for a year. He thought I was throwing my life away.

Every math curriculum in the world is based on the idea of hand-calculating, and most of what you're teaching is how to calculate. And I think the resistance to this is very variable.