Monkeys

Monkeys are used in The Selfish Gene to illustrate two linked questions: how remembered encounters organize social behavior, and why apparent care for an unrelated young animal may not benefit the caregiver’s genes. Their examples give concrete form to the book’s distinction between individual behavior and group-level outcomes, while its discussion of adoption warns against treating kinship as something an observer can infer from a label or a touching act.

Recognition and Social Rank

The book contrasts monkeys with Crickets, whose fighting histories affect later contests through general memory. Monkeys, by contrast, recognize particular opponents: an individual is more likely to yield to one who has beaten it before. In this account, that specific history changes the appropriate response to a particular animal, rather than simply shifting a general estimate of fighting ability.

The distinction also clarifies how dominance hierarchies arise. When unfamiliar Hens are brought together, they initially fight; as each learns her relative place in relation to the others, overt fighting declines. The book links established groups of Hens, where serious fighting is rare, with higher egg production than in groups whose membership changes continually. It cautions, however, against assigning the hierarchy itself an evolutionary function: the hierarchy is a group-level pattern, whereas selection acts on individual behavior. The relevant explanation is framed instead in terms of strategies in contests where opponents recognize and remember one another.

Kinship, Adoption, and Misfiring Rules

The discussion of adoption places Monkey behavior within a broader account of kin-directed care. The book calls the adopting female an “aunt” only to question that label: observers often have no evidence that she is actually related to the orphan. If she is unrelated, care may represent a misfiring of a behavioral rule rather than an evolved benefit to her own genes, because the time and energy spent on the orphan could otherwise go to her kin or future offspring. The book suggests that such cases may be too uncommon for selection to have made maternal care more selective; it also notes that orphans are often not adopted and are left to die.

A more striking case involves bereaved Monkey mothers that take another female’s baby and care for it. The author interprets this as a possible double mistake: the adopter incurs the cost of care, while the child’s mother is freed from that burden and may be able to have another child sooner. The explanation is presented as unresolved rather than settled. The book calls for research into how often the behavior occurs, the likely relatedness between adopter and infant, and whether the infant’s mother may benefit from adoption or even induce it. It also records the suggestion that adoption or taking a baby could provide practice in child-rearing, without establishing that account as the answer.

Kinship as Biology and Culture

The Monkey examples sit beside a broader distinction between genetic relatedness and culturally understood kinship. Humans commonly identify relations through names, formal marriages, written records, and memory; social anthropologists may study kinship as a system of subjective and cultural ideas rather than as genetic relationship. Family obligations, ancestor worship, blood-feuds, and inter-clan warfare are presented as practices that can be interpreted through the book’s genetic account, while incest taboos are assigned a different proposed explanation: avoiding harmful effects of recessive genes associated with inbreeding, not promoting altruism.

For animals, the text asks what simple behavioral rules could produce care toward close relatives without requiring an animal to calculate relatedness consciously. A tendency to help individuals that resemble oneself might, on average, direct aid toward kin, but it could also misfire when circumstances change, such as when a species begins living in larger groups. This argument frames Monkey adoption not as proof of human-like moral intention, but as a case for examining the cues and conditions under which a rule operates.

Role in the Gene-Centered Argument

Monkeys help the book separate the observable social pattern from the evolutionary explanation proposed for it. Recognition can make an individual’s behavior depend on the identity and history of a particular opponent; adoption can appear generous while failing, in some cases, to serve the adopter’s genetic interests. Neither example makes group welfare the selecting agent. They instead support the book’s emphasis on individual behavior and on the conditions under which limited altruism may arise through kinship.

That account depends on careful distinctions. A social title such as “aunt” does not establish biological relatedness, and a behavior that looks beneficial or compassionate at the group level does not by itself reveal why it persists. By pairing remembered contests with uncertain adoption, the book uses Monkeys to show how familiar social interpretations can be tested against the different question of whose genes are likely to be passed on.