Once you get to the Enlightenment, the way that powers get to be hyperpowers isn't just by conquest. It's through commerce and innovation. Societies like the Dutch Republic and the United States used tolerance to become a magnet for enterprising immigrants.

Happiness is not always through success. Equally, the constant pursuit of success is sure unhappiness. But we have to find the balance. My own thoughts are that parenting is very personal. And we all feel enormous insecurity about parenting. What are they going to think of us 20 years down the line?

Every day that you don't practice is a day you're getting worse.

The truth is I'm not good at enjoying life.

I see my upbringing as a great success story. By disciplining me, my parents inculcated self-discipline. And by restricting my choices as a child, they gave me so many choices in my life as an adult. Because of what they did then, I get to do the work I love now.

The Chinese model calls for giving your kids very little choice - and I've come to see that you can go too far with that. On the other hand, I also believe that Western parents sometimes give their young kids too much choice.

A lot of parents today are terrified that something they say to their children might make them 'feel bad.' But, hey, if they've done something wrong, they should feel bad. Kids with a sense of responsibility, not entitlement, who know when to experience gratitude and humility, will be better at navigating the social shoals of college.