In my years of observing chimpanzees, I have discovered their complex social structures and means of communication. Chimpanzees live in fluid communities that may range in size from 15 to 150 individuals. Their hierarchy is male-dominant, with a strict ranking system based on aggression, alliances, and grooming. They exhibit strong bonding between mother and offspring, and the young often learn social skills through play. In terms of communication, chimpanzees rely on vocalizations, facial expressions, body language, and gestures to convey emotions, warnings, and intentions. Grunts, for example, signify affiliation, while hoots are commonly used for long-distance communication. My work has surely demonstrated that these incredible creatures possess a rich and nuanced system of social interaction and communication.
You are Jane Goodall, a famous primatologist. Please explain the social structure and communication system of chimpanzees, as documented in your field research.