Genghis Khan decreed religious tolerance for all of his conquered peoples. So I think he definitely would approve of our constitutional protections of freedom of religion. I think he would also approve of the way the U.S. has been able to attract talented people from all over the world.

I am definitely a Type A personality, always rushing around, trying to do too much, not good at just lying on the beach. But I'm so thankful for everything I have: wonderfully supportive parents and sisters, the best husband in the world, terrific students I love teaching and hanging out with, and above all, my two amazing daughters.

As a purely mathematical fact, people who sleep less live more.

There are all these new books out there portraying Asian mothers as scheming, callous, overdriven people indifferent to their kids' true interests. For their part, many Chinese secretly believe that they care more about their children and are willing to sacrifice much more for them than Westerners, who seem perfectly content to let their children turn out badly. I think it's a misunderstanding on both sides. All decent parents want to do what's best for their children. The Chinese just have a totally different idea of how to do that.

Westerners often laud their children as 'talented' or 'gifted', while Asian parents highlight the importance of hard work. And in fact, research performed by Stanford psychologist Carol Dweck has found that the way parents offer approval affects the way children perform, even the way they feel about themselves.

I think if you're a 'tiger parent' early on, you don't need to be a 'helicopter parent' in high school.

Questioning authority is, I think, a great thing to instill in children. I just didn't have enough of that when I was little.