Until we fully understand what turned two brothers who allegedly perpetrated the Boston Marathon bombings into murderers, it is hard to make any policy recommendation other than this: We need to redouble our efforts to make America stronger and healthier so it remains a vibrant counterexample to whatever bigoted ideology may have gripped these young men....And the best place to start is with a carbon tax.

Do you know what my favorite renewable fuel is? An ecosystem for innovation.

We need to become energy independent or at least aspire to that.

Many of us who grew up playing golf know that our kids aren't doing it. A great way to enhance the game, make it cool again and bring back some of the interest among younger people is to make golf the greenest sport in an environmental sense. Every course's greenkeeper should think of himself or herself as the greenkeeper: responsible for preserving the green, not just the greens.

We are entering a hyperconnected world where every boss now has more access, cheap access to cheap labor, cheap genius, cheap robot, cheap software, and then this world averages over. There is only one answer to that, and that is to get everyone as close as possible to some form of post-secondary education, it could be vocational, it can be liberal arts, it can be science and technology.

What we do know is that the planet is going from 7 billion people today to 9 billion. More people want to live like us, drive American- size cars, live in an American-size home, and eat American-size Big Macs. What does that mean? It means that energy demand is going to be going up.

Capitalism makes people unequally rich. Communism makes people equally poor.