Management's primary' job is to make organizations operate effectively. Society's work gets done through organizations and management's function is to get organizations to perform that work. Getting organizations to operate effectively is difficult, however. Understanding one individual's behavior is challenging in and of itself; understanding a group that's made up of different individuals and comprehending the many relationships among those individuals is even more complex. Imagine, then, the mind-boggling complexity of a large organization made up of thousands of individuals and hundreds of groups with myriad relationships among these individuals and groups.