Mikhail Bakhtin was a Russian philosopher and literary critic known for his contributions to literary theory and the philosophy of language, particularly through concepts like heteroglossia, dialogism, and the utterance. His work emphasized the social nature of language and the complex interactions between speakers, listeners, and their contexts, challenging traditional notions of language as a neutral medium. Bakhtin's ideas have influenced various disciplines, leading to a modern understanding of language as a dynamic process shaped by multiple voices and intentions.