One of the most potent symbols of power is the pyramid. It's also roughly the shape of the classic top-down, military-style command-and-control organizational structure called a hierarchy. In this very linear model, a general (the CEO) is on a mission with an objective and a strategy to achieve it. He (they are almost all of that gender) gives orders down the rank for tactical execution by troops on the front-line. All those terms are classical military terms, but even the military is reforming the way it thinks about organizational design and the "rank and file" (status and seniority).