Theodor Adorno was director of the Institute for Social Research at the University of Frankfurt from 1956 until his death in 1969. His works include In Search of Wagner; Aesthetic Theory; Negative Dialectics; and (with Max Horkheimer) Dialectic of Enlightenment and Towards a New Manifesto.Else Frenkel-Brunswik was a Polish-Austrian psychologist based at the University of California at Berkeley.Daniel J. Levinson was a psychologist, and one of the founders of the field of positive adult development. Nevitt Sanford was professor of psychology at the University of California at Berkeley.