The most successful hyperpowers are the ones where there was actual intermixing. Tang dynasty China was China's golden age, and contrary to what I was told when I was growing up, Tang China was founded by a man who by today's standards was no more than half Chinese. It was a mixed-blood dynasty that pulled in 'barbarians' from the steppe.

I saw my parents come over. They were immigrants, they had no money. My dad wore the same pair of shoes, I had some ugly clothes growing up, and I never had any privileges. In some ways, I think the person that I am now, I think it's good that I had that kind of tough upbringing.

Some people don't need parental commitment, they will still come out great, but for others, parents can be critical in providing moral and academic guidance.

I sort of feel like people are not that honest about their own parenting. Take any teenage household; tell me there is not yelling and conflict.

There's a sort of sibling moratorium when you're establishing yourself as an adult. So much of your energy has to be focused on other things like work and kids. But when people become more settled, siblings tend to regroup because now you're building a new extended family.

I am the mother, and the emotional chord with my children is naturally strong. So there are times when I might get sleepless nights because I am worried.

When it came to healthy eating, my parents did their best to set me on the right path. At school, my friends ate McDonalds at lunchtime, but I had a packed lunch that my mother made for me. I hated it at the time, but looking back, I'm glad.

We're all fascinated by the way other people live their lives, how they cope with hardship and triumph, what they put in their home movies and family albums.