The Comparative Method and Reconstruction
The core methodology of historical linguistics: comparing related languages to recover the shared ancestor (proto-language) from which they descend, and inferring the changes that produced the attested forms.
Definition
The comparative method is a systematic procedure that compares cognate words and morphemes across genetically related languages to establish regular sound correspondences and reconstruct features of their common proto-language.
Scope
This area covers the techniques by which linguists establish genetic relationships and reconstruct unattested ancestral languages. It includes the comparative method proper (assembling cognate sets, identifying regular sound correspondences, and positing proto-forms), internal reconstruction from a single language's irregularities, and methods of relative and absolute dating such as glottochronology, along with their well-known limitations.
Sub-topics
Core questions
- How do linguists demonstrate that languages are genetically related rather than similar by chance or contact?
- How are regular sound correspondences identified and used to reconstruct proto-forms?
- What can internal reconstruction recover from a single language without comparative evidence?
- How reliable are attempts to date language splits, and why is glottochronology controversial?
- What are the limits of reconstruction, and what aspects of a proto-language can or cannot be recovered?
Key theories
- The comparative method
- By assembling cognate sets and identifying regular, recurrent sound correspondences among related languages, linguists reconstruct proto-forms and the sound changes leading to each daughter language; regularity of correspondence is the chief safeguard against chance resemblance.
- Internal reconstruction
- Patterned alternations and irregularities within a single language can reveal earlier states, allowing partial reconstruction even where comparative evidence is unavailable.
History
The comparative method was developed in the nineteenth century as scholars systematized the comparison of Indo-European languages, culminating in the Neogrammarian insistence on regular sound change. August Schleicher introduced reconstructed proto-forms and the family-tree model, and Antoine Meillet codified the method's logic in the early twentieth century. Glottochronology, proposed by Morris Swadesh in the 1950s, attempted to add an absolute time dimension but remains widely criticized.
Debates
- Reliability of glottochronology
- Swadesh's assumption of a constant rate of basic-vocabulary replacement has been criticized as empirically unfounded, making absolute dates from glottochronology unreliable; many linguists accept only relative chronologies from the comparative method.
Key figures
- Antoine Meillet
- August Schleicher
- Karl Brugmann
- Morris Swadesh
Related topics
Seminal works
- meillet1925
- campbell2013
- fox1995
Frequently asked questions
- Is a reconstructed proto-language a real language that was once spoken?
- A reconstruction is a hypothesis about an ancestral language based on regular correspondences; it approximates but cannot fully recover the original spoken language, and some features remain irrecoverable.
- How is the comparative method different from just noticing similar words?
- It requires regular, recurrent sound correspondences across many words, not isolated look-alikes, which distinguishes genuine inherited cognates from chance resemblances and borrowings.