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Why have linguists criticized the family-tree model of language development?
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Linguistics
Much of the foundation of 20th-century sociolinguistics was created by the Swiss linguist Ferdinand de Saussure (1857–1913).
Linguists have criticized the family-tree model of language development, introduced by August Schleicher, primarily because it relies on a misleading genealogical metaphor.12
Key criticisms include:
- Inaccurate Biological Assumptions: The model implies that languages are "born" from a parent language and that the parent "dies" or remains unchanged, which does not reflect the reality of linguistic evolution.1
- Failure to Account for Convergence: The model assumes languages only diverge over time. In reality, languages often undergo convergence—where distinct dialects or languages become more similar due to cultural, political, or social contact.1
- Ignores Gradual Change: The model presupposes independent development following a sudden, sharp cleavage between speech communities. Critics argue this rarely occurs, as linguistic changes often spread gradually across regions.1
As an alternative, Johannes Schmidt proposed the "wave theory," which suggests that linguistic innovations spread like waves from influential centers of communication, resulting in gradual transitions between dialects rather than the rigid, branching structure of a family tree.1