Language Universals and Language Evolution
Even though there are no linguistic models readily available for in-depth study of various aspects of Linguistics, many theories have been borrowed from other disciplines to draw parallels for linguists to revise and generate theories to explain the phenomenons found in linguistics. The use of typological universal has allowed for study on psychology in human thinking and learning theories (Greenberg, 1957). More importantly, typology can be applied to most languages in discerning the clustering of attributes that are present in the language. The existence of such variations across language universals could support for the progress of languages across time. Perhaps, with enough linguistic evidence, the proto-form of language could shed light on how language had evolved as a communication system, by humans for humans.
Based on what have been discussed, universals in morphology, syntax and phonology showed evidence for both innateness and adaptation for language evolution. Yet, there still remains room for much debate on how universals should be determined and how it can be related to the huge umbrella of Language Evolution.