Language explained in terms of Linguistic Induction
Lenneberg spent considerable time gathering evidence world wide to support the Species Specific concept.
3. Linguistic Induction Theories of language development in many ways carry the Species Specific perspective to the maximum.
The best known proponent of Linguistic Induction is Chomsky who postulated a Language Acquisition Device (LAD).
This was a hypothesized neurological structure which is genetically inherited by humans and which possesses a general knowledge about language grammar--Universal Grammar.
LAD enables the child to develop language with inordinate speed, even in instances of minimal language stimulation.
NOTES: Here is some information on Brain evolution and LAD
NOTES: Here is more than you probably want know about Language Acquisition Theories