Traits passed from parents to children change slowly and resist replacement, because each learner has few models and acquires them before alternatives are available.
Language, religion, dietary practice and political allegiance transmit substantially this way, and the resulting conservatism is structural rather than a matter of conviction: the child encounters the variant first, from a trusted and repeated source, in the absence of competitors. Traits that transmit vertically therefore track descent and can be used to reconstruct it.
In practice
- A family firm's approach to risk survives three changes of market and two of leadership.
- A regional accent persists in a town whose economy, population and industry have all been replaced.
- Standing
- Paired with horizontal transmission, which is faster and less faithful.
- Further reading
- Wikipedia
- Subject
- Sociology & Culture
- Essay
- How societies hold together, sort people, and change