Steven Weinberg holds the Josey Regental Chair in Science at the University of Texas at Austin, where he is a member of the Physics and Astronomy Departments. His research on elementary particles and cosmology has been honored with numerous prizes and awards, including in 1979 the Nobel Prize in Physics and in 1991 the National Medal of Science. In 2004 he received the Benjamin Franklin Medal of the American Philosophical Society, with a citation that said he is “considered by many to be the preeminent theoretical physicist alive in the world today.” He has been elected to the US National Academy of Sciences and Britain’s Royal Society, as well as to the American Philosophical Society and the American Academy of Arts and Sciences. He is the author of over 300 articles on elementary particle physics. His books include The First Three Minutes (1977); The Discovery of Subatomic Particles (1983, 2003); Elementary Particles and The Laws of Physics (with R.P. Feynman) (1987); Dreams of a Final Theory—The Search for the Fundamental Laws of Nature (1993); a trilogy, The Quantum Theory of Fields (1995, 1996, 2000); Facing Up—- Science and its Cultural Adversaries (2002); and most recently Glory and Terror—The Growing Nuclear Danger (2004). Articles of his on various subjects appear from time to time in The New York Review of Books. He has served as consultant at the U.S. Arms Control and Disarmament Agency, the JASON group of defense consultants, and many other boards and committees.