One of the tasks of the leader is to create structure. Structure is a critical part of any organization, which needs rules, policies, and clear roles in order to function. However, it is quite difficult to achieve the right balance between structure and flexibility. Not enough structure prevents efficient, coordinated efforts toward the group’s goals. It can also result in chaos, corruption, and abuse of power. Too much structure leaves the organization inflexible and poorly adapted to change or to variability in local conditions. Because of this, a parallel underground system can develop outside the rules of the formal structure. This is similar to the black markets that develop in countries whose economies are overly controlled.