 Economic growth isn't all good. There's pollution. There are environmental consequences. But fundamentally, growth is about things getting faster, getting cheaper, getting more efficient. It's about doing the same amount of work and being able to buy 20,000 hours of light instead of 10 minutes. And as a result, it's about being able to work less or to buy other stuff that used to be just for the wealthy. We can buy books. We can take vacations.