This document discusses different theories of first language acquisition. It provides an overview of the behaviorist and mentalist schools of thought. The behaviorist view, proposed by theorists like Skinner, is that language is learned through imitation, reinforcement, and habit formation in response to environmental stimuli. The mentalist view, proposed by Chomsky, argues that language acquisition is based on innate, language-specific capabilities rather than environmental conditioning. The document also discusses criticisms of each theory and debates around the role of nature versus nurture in language development.