This document provides an overview of the history and major approaches in the field of linguistics. It discusses:
1) 19th century historical linguistics focused on comparing languages and reconstructing ancestral forms.
2) Early-mid 20th century descriptive linguistics emphasized describing individual languages led by Ferdinand de Saussure and Leonard Bloomfield.
3) Mid-late 20th century generative linguistics shifted to studying the underlying rules and universals of language proposed by Noam Chomsky.