Bernard Reuben Berelson (1912–1979) was an American behavioral scientist, known for his work on communication and mass media. He was a leading proponent of the broad idea of the "behavioral sciences", a field he saw as including areas such as public opinion. In Chapter 14 of Voting (1954), he enunciated what has become known as Berelson's paradox on democracy: while classical theories of its success assume voters committed to interest in public life, this fails to correspond with practical politics, while the system itself functions.