Language and society are deeply intertwined, shaping each other in complex ways. This unit explores how language varies across social groups, reflects power dynamics, and serves as a marker of identity. It also examines historical perspectives on language study and current trends in the field. Language policy, planning, and education play crucial roles in maintaining or shifting language use. The unit covers topics like bilingual education, language revitalization efforts, and the impact of globalization on linguistic diversity. It also delves into how language functions in social interactions and reflects broader societal power structures.