It's a Wonderful Life. This film illustrates that if you treat your customers with respect, they will recognize you and even help when you're most in need.

The oldest and most important currency is debt.

Money is becoming increasingly plastic and digital. If there is a major disaster, let's say an asteroid strike, we'll go back to trading meats and furs. We won't need an abstraction, a dollar bill, but real tangible goods to survive.

Albert Murray's The Omni-Americans is the most valuable non-business book because it discusses how you have to draw upon everyone's creativity. America is a mash-up of cultures and traditions, and great businesses know how to tap the strengths of all their employees, whatever their background may be.

I think the money for the solutions for global poverty is on Wall Street. Wall Street allocates capital. And we need to get capital to the ideas that are successful, whether it's microfinance, whether it's through financial literacy programs, Wall Street can be the engine that makes capital get to the people who need it.

After Hurricane Katrina, I wanted to go back to New Orleans to help musicians return to the city. But Andrew Young advised me, "If you want to help people, go work at an investment bank." His contrarian advice opened my eyes to the importance of capital. "Learn how to make some money before you give it away." I learned that you can bring about good in the world especially if you have a paycheck.

We are privileged that the dollar is the "currency of last resort" and the most important currency in the world. Global commodities are priced in dollars. Central banks in other countries hold great quantities of dollars. The dollar was the safe harbor, the port in the storm during the credit crisis.