Steven Weinberg is a professor in the Physics and Astronomy Departments of the University of Texas, where he holds the Josey Regental Chair in Science. He has received the Nobel Prize in Physics, the National Medal of Science, and numerous other awards, and has been elected to the US National Academy of Sciences, Britain’s Royal Society, and other academies. His articles for general readers appear in The New York Review and other periodicals, and have been collected in two books, Facing Up and Lake Views. He has served as consultant at the U. S. Arms Control and Disarmament Agency and member of the Council of Scholars of the Library of Congress, the JASON group of defense consultants, and many other boards and committees. In 1994 he was President of the Philosophical Society of Texas. He received his A. B. from Cornell and his Ph. D. from Princeton; he also holds honorary doctoral degrees from sixteen other universities. He taught at Columbia, Berkeley, M.I.T., and Harvard, where he was Higgins Professor of Physics, before coming to Texas in 1982.