Silvan S. Schweber is Professor Emeritus of Physics and Richard Koret Professor in the History of Ideas at Brandeis University and an Associate in Harvard's Department of the History of Science. He obtained a Ph.D. in theoretical physics from Princeton in 1952, and later became a historian of science. He is a Fellow of the American Physical Society and the American Academy of Arts and Sciences, and author of "Introduction to Relativistic Quantum Field Theory" and "QED and the Men Who Made It" (Princeton).