Reputation will become an even more important currency in the future.

All organisms rely on exchange. They form symbiotic partnerships in order to obtain the energy that they need to survive. Energy is the currency of nature.

Researchers have compared brain scans of those people who are making money to those high on cocaine and found that them to be almost identical. Money has a biological and psychological effect on us.

It is important to understand that the most important currency is social debt. Doing things for others. In order to get, you have to give.

For the last several decades, there was a prevailing belief among traditional economists that the markets were rational and self-correcting. Alan Greenspan advocated this view. But the 2008 financial crisis showed that this view is incorrect, and Greenspan eventually admitted as much.

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.

People have tried to control other people by trapping them with debt. A loan can become a harmful and dangerous weapon.