Robert L. Jaffe holds the Morningstar Chair in the Department of Physics at Massachusetts Institute of Technology (MIT). He was formerly director of MIT's Center for Theoretical Physics and recently chaired the American Physical Society's Panel on Public Affairs. Jaffe is best known for his research on the quark substructure of the proton and other strongly interacting particles, on exotic states of matter, and on the quantum structure of the vacuum. He received his B.A. from Princeton and his Ph.D. from Stanford. In recognition of his contributions to teaching and course development at MIT, Jaffe has received numerous awards including a prestigious MacVicar Fellowship. Jaffe is a member of the American Academy of Arts and Sciences.