Cultures are constantly evolving, organizational cultures are much like social cultures they live, breath and they evolve.
Culture is a construct so abstract that it is difficult to describe or measure!
But yet it is the one and only thing that differentiates people, places and their behaviors. Isn't it amazing that the CEO of an organization can single handedly steer the culture of an organization? How ever mature the culture, the CEO sets the tone through his or her actions and is often the epitome of the behavior to expect.