kin selection
C1/C2Academic, Technical/Scientific
Definition
Meaning
A biological theory explaining how natural selection can favour behaviours that help relatives survive and reproduce, even at a cost to the individual's own survival or reproduction.
The evolutionary mechanism by which altruistic behaviour directed towards genetic relatives is favoured because it increases the survival of shared genes. It is a key concept in sociobiology and evolutionary psychology, used to explain cooperative behaviours within families or closely related groups.
Linguistics
Semantic Notes
Primarily a noun phrase. It refers to a specific evolutionary process, not a general act of helping family. Often contrasted with 'reciprocal altruism' (helping non-relatives).
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. The term is identical and used identically in both academic traditions.
Connotations
Purely scientific, neutral connotation in both variants. No cultural or emotional overtones.
Frequency
Extremely low frequency in everyday language. Used with equal frequency in British and American academic biology, anthropology, and psychology contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
Kin selection explains [behaviour/altruism].[Behaviour/Altruism] is explained by kin selection.Kin selection favours [altruistic acts] towards [relatives].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[Not applicable for this technical term]”
Usage
Context Usage
Business
[Extremely rare or non-existent]
Academic
Core concept in evolutionary biology, sociobiology, and anthropology. E.g., 'The paper examines kin selection in eusocial insect colonies.'
Everyday
[Virtually never used]
Technical
Used precisely in biological sciences to model the evolution of social behaviour. E.g., 'The coefficient of relatedness is central to kin selection calculations.'
Examples
By Part of Speech
verb
British English
- [Not standard; the term is nominal. One might say 'behaviour favoured by kin selection' or 'kin-selected traits'.]
American English
- [Not standard; the term is nominal. One might say 'traits explained via kin selection'.]
adverb
British English
- [Not applicable; no standard adverbial form.]
American English
- [Not applicable; no standard adverbial form.]
adjective
British English
- The researcher presented a kin-selection model for the birds' alarm calls.
American English
- They studied the kin-selection hypothesis for cooperation in primate groups.
Examples
By CEFR Level
- [Too advanced for A2 level]
- Animals sometimes help their family. Scientists call this idea 'kin selection'.
- Kin selection explains why a bee might die to protect the hive, as the other bees are its close relatives.
Learning
Memory Aids
Mnemonic
Think 'KINdness to your KIN' – selection favours helping your genetic kin.
Conceptual Metaphor
GENES ARE ACCOUNTANTS; organisms are vehicles for genes that 'calculate' relatedness to maximise their own replication.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'kin' as just 'family' (семья). It specifically means 'genetic relatives' (родственники, сородичи).
- Avoid translating 'selection' as 'choice' (выбор). It is 'natural selection' (естественный отбор). A direct translation 'родственный отбор' is the established term.
Common Mistakes
- Using it to describe simple family favouritism in human society without an evolutionary framework.
- Confusing it with 'group selection'.
- Using it as a verb, e.g., 'Animals kin-select' (incorrect).
Practice
Quiz
Kin selection is most likely to favour altruistic behaviour when:
FAQ
Frequently Asked Questions
The concept was mathematically formalised by the British evolutionary biologist W.D. Hamilton in 1964, known as Hamilton's rule.
Kin selection acts on genes shared by related individuals, favouring altruism towards relatives. Group selection (a more controversial idea) suggests selection can act on whole groups, favouring traits that benefit the group even if they harm the individual, regardless of relatedness.
No. Kin selection explains altruism towards genetic relatives. Altruism towards non-relatives is often explained by other mechanisms like reciprocal altruism ('you scratch my back, I'll scratch yours') or indirect reciprocity.
Not exactly. 'Survival of the fittest' is a broad, often misunderstood, description of natural selection. Kin selection is a specific mechanism within natural selection where 'fitness' is measured inclusively—considering the survival of one's genes in relatives as well as in oneself.