High Quality Content by WIKIPEDIA articles! Leonard Susskind (born 1940) is the Felix Bloch Professor of Theoretical Physics at Stanford University, and Director of the Stanford Institute for Theoretical Physics. His research interests include string theory, quantum field theory, quantum statistical mechanics and quantum cosmology. He is a member of the National Academy of Sciences, and the American Academy of Arts and Sciences, an associate member of the faculty of Canada`s Perimeter Institute for Theoretical Physics, and a distinguished professor of the Korea Institute for Advanced Study.