Perhaps concentrated wealth will inspire a nation of innovative problem-solvers. But if the view of many economists is right - that it sometimes discourages innovation - then we should worry.

The Internet is, among other things, a massive, chaotic marketplace. Too much information, it turns out, is a lot like no information.

Hating Wall Street is an American tradition that dates back even to the days when Thomas Jefferson cursed that money lover Alexander Hamilton. And for centuries, the complaints about it have largely stayed the same: 'It does nothing! It creates chaos! It's a parasite that sucks hardworking Americans dry!'

Unlike physics, economists don't settle things. There seems to be plenty of room for different conclusions that are still accepted in the academy.

Do not speak of your happiness to one less fortunate than yourself.

Life continues to be difficult. It always will be because that's just life. But I am so glad I have put some happiness into the world.

Your joy comes from how you think, the choices that we make in life.

As so much music is listened to via MP3 download, many will never experience the joy of analog playback, and for them, I feel sorry. They are missing out.