Shows how interconnected major corporations are. You can display interconnection maps, where members of the board of one company also sit on the board for another company. One map shows how the folks who were on George H Bush's cabinet were on the same companie's boards that Clinton's cabinet members on. To see how it works, try loading some of the popular maps.
While some may think grand conspiracy, some may think its just a case of the best and brightest using their talents.
Many people sit on boards of companies they do not work for. They're job is to help the corporation.
Some of these people are also in government service at times. When you want somebody to help set energy policy, who would you rather have making informed decisions, a phd from berkely who has never had a private sector job in his life, or the guy who just retired from one of the best energy companies in the world?
Professor joe blow from UCLA may be a smart guy and have a phd in economic theory, but would you rather him set up a stock market policy, or someone like warren buffet who puts his money where his mouth is?