One of the most respected and prolific scholars on the subject of love, Yale psychology and education professor Robert J. Sternberg, has acknowledged that no single definition describes love throughout the ages or across cultures. Although philosophers, theologians, and poets have investigated the nature of love for centuries, love research as a scientific field is relatively new in the wider array of disciplines that now investigate love — social and behavioral psychology, sociology, cultural anthropology, human communication, women’s studies, men’s studies, family studies, evolutionary biology, and mass communication. For these experts as well as for the general public, love means different things to different people at different historical periods and in different cultures.