Are they related?

I often view Corporate America with a little disdain. The CEOs, and other executives just don't seem smart enough to me to be in charge of that much money and that much power and those many lives. They got where they are for a reason, but I'm not sure that it's always because
of their strengths and abilities (other than the ability to play the political game). In addition, it's a club to which I have no desire to join -- it's the THEM in the "US versus THEM."

Often, the "them" is really "them and them and them". Certain persons seem to influence multiple entities, through board memberships, or actual corporate positions. One site that can help identify these relationships is the NNDB. Feed it a list of corporations, persons, even bands, movies or TV shows and it can help diagram the relationships between them all. You can also search through already created maps to find some interesting insights into the behavior of some companies...