Final answer:
A.R. Radcliffe-Brown was a social anthropologist known for his systemic view of social structures and functions, particularly within primitive societies, as detailed in his 1952 book, 'Structure and Function in Primitive Society'.
Step-by-step explanation:
A.R. Radcliffe-Brown was an influential figure in the field of social anthropology. He is well-known for his work on social structures and their functions within primitive societies. His theories and methodologies had a significant impact on the development of modern anthropology. Drawing on his extensive field work, Radcliffe-Brown's book, Structure and Function in Primitive Society: Essays and Addresses, published in 1952, contains a collection of essays that detail his theoretical approach to understanding social structures. Unlike the radical abolitionist John Brown, Radcliffe-Brown's contributions were in the academic sphere where he fostered a systemic view of social relations based on the concept of social function, which emphasizes the interdependence of the institutions that form the social structure.