Communication is such a critical part in Leadership, that it can truly be a defining factor on whether a company succeeds or fails. Misunderstandings, Assumptions, and simply LACK of Communication are all detrimental to even the best of businesses. In fact, I think it may be THE #1 thing that could make a difference of whether a company succeeds or fails.
I remember stories my other grandfather used to tell of his travels as a Pilot for the US Air Force. He taught me a lot about how a plane flies, and how a "flight plan" is determined and so on. It wasn't until years later that I would reflect on his stories in my memories of him that I started to realize how much flying a plane is like going through life.