Ape gesture communication has long been central to debates about how human language began. A review by Kirsty Graham, Federico Rossano and Richard Moore argues that great apes do more than make gestures. They seem to understand the goal behind them. For Paper I, this is a careful and current way to discuss primate communication and the roots of language.
Source: Graham, Rossano and Moore, “The origin of great ape gestural forms,” Biological Reviews 100(1), 190 to 204 (online August 2024). Background and examples from New York Times reporting by Carl Zimmer, 6 September 2024.
Gestures in the wild
Jane Goodall noticed at Gombe that chimpanzees gesture to one another. Males tip their heads up as a threat, for example, and mothers signal to their young to climb on their backs. Later researchers have catalogued more than 80 meaningful gestures across chimpanzees, bonobos, gorillas and orangutans. The question is where these gestures come from and what the apes understand when they use them.
Two older explanations
The Leipzig view, linked to Michael Tomasello, treats gestures as habits that grow out of repeated one-to-one routines. A baby keeps grabbing at its mother’s food. Eventually she starts to hand it over as soon as the arm stretches out, and the baby shortens the action into a gesture. On this view the ape simply learns that the gesture delivers what it wants. It predicts a lot of variety, because every pair of animals would build its own signals.
Large surveys found the opposite: chimpanzees share the same gestures, and some are shared across species. That led to the St Andrews view, associated with Richard Byrne, which holds that gestures are largely innate and shaped by natural selection. Graham came to doubt it too. In her words, is it really simpler to say that 80 gesture types are all genetically encoded?
The Recruitment View
The authors propose a third account. Apes do not inherit particular gestures. They inherit the sense that gestures can communicate, and they recruit movements they already make in daily life. An ape can reach out an arm to ask for food, such as a piece of freshly caught monkey. The partner is already watching the food, so the gesture turns an obvious wish into an explicit request.
| View | How gestures arise | Main prediction |
|---|---|---|
| Leipzig View | Learned through repeated social routines | Much variety between pairs and groups |
| St Andrews View | Largely innate, shaped by natural selection | Shared forms across individuals and species |
| Recruitment View | Familiar actions repurposed as signals | Shared forms, because bodies and daily actions are similar |
The authors say this fits observations the older views struggle with. When a gesture fails, an ape may move so that its partner can see it better, which suggests a goal-directed signal and not a fixed habit. Shared forms are expected, because apes have similar bodies, and a partner can interpret a gesture by thinking about what it does with its own body. The idea also suggests why apes find human finger-pointing hard to read: pointing has no clear link to their everyday actions. The researchers predict that apes can learn new gestures if the gestures have a purpose, and they are designing experiments to test that.
Not everyone is persuaded
Byrne has called the Recruitment View quite a complicated system, and he asks whether the extra theory is worth it for a better description of reality. Tomasello, by contrast, sees it as an improved version of his own ritualisation idea. The debate is open, and your answer should say so.
What it means for language origins
Some scientists have argued that ape gestures led directly to human language. Rossano and colleagues see a more distant link. Our ape ancestors evolved unusual flexibility in learning and using gestures, and flexibility of this kind is also a vital part of language. This fits the wider family of gesture-first theories, which contrast with models that start from vocal calls. It does not show that apes have language, and it does not settle the gesture-first versus vocal-origin debate.
Using it in UPSC Mains
The syllabus gives two anchors. Paper I, Section 1.5 lists primate behaviour, and the Paper I language topic covers the nature and origin of language and non-verbal communication. Cite the Recruitment View as a recent attempt to reconcile learned and inherited accounts of ape gesture. Give one concrete example, such as the outstretched arm asking for food, and then link it cautiously to human language origins. Avoid writing that apes “have language”.
No exam question matches ape gesture closely, so use the study as a Mains example for communication and language-origin answers. More questions are in the Human Evolution and Primatology PYQs. For related reading, see Early Human Hands: Climbing and Tool-Making and chimpanzee play and the origins of culture. For the full syllabus and answer-writing plan, see the Anthropology Optional complete guide.