Hartry Field is an American philosopher known for his work in the philosophy of mathematics and language. He is particularly recognized for his development of the idea of "nominalism," which argues against the existence of abstract objects like numbers and sets. Field's influential book, *Science Without Numbers*, presents a framework for understanding mathematics without relying on these abstract entities. Field has also contributed to discussions on the nature of truth and reference, exploring how language relates to the world. His ideas have sparked debates in the fields of philosophy of mathematics, metaphysics, and philosophy of language, influencing both contemporary and historical perspectives.