Behaviorist traditions had an enormous amount of trouble finding a sensible way to talk about language. Families of universal grammar theories were a hugely influential response to such traditions. As the name suggests, universal grammar theories tend to emphasize the study of commonalities in language structure across culture, the neurobiological or genetic or evolutionary mechanisms that might explain these commonalities, and the developmental stages of these commonalities' expression. These interests are frequently at the expense of exploring the role of learning and experience in language.
Chomsky, N. (2011): Language and Other Cognitive Systems. What Is Special About Language?,Language Learning and Development, 7:4, 263-278.