Steven Weinberg is an American theoretical physicist and Nobel laureate in Physics for his contributions to the unification of the weak force and electromagnetic interaction between elementary particles. Weinberg received his Bachelor's degree from Cornell University. He studied at the Niels Bohr Institute in Copenhagen, and earned his PhD in Physics at Princeton University.

He holds the Jack S. Josey-Welch Foundation 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.

Articles of his on various subjects appear from time to time in The New York Review of Books and other periodicals. He has served as consultant at the U. S. Arms Control and Disarmament Agency, President of the Philosophical Society of Texas, and member of the Board of Editors of Daedalus magazine, the Council of Scholars of the Library of Congress, the JASON group of defense consultants, and many other boards and committees. Some of these articles are published in two essay collections, Facing Up and Lake Views.  His other books for general readers include The First Three Minutes, Dreams of a Final Theory, and most recently a history of physical science, To Explain the World.  He has published scientific treatises on General Relativity, Quantum Field Theory, Cosmology, and Quantum Mechanics. Weinberg holds honorary doctoral degrees from sixteen other universities, including Chicago, Columbia, McGill, Padua, Salamanca, and Yale. He taught at Columbia, Berkeley, M.I.T., and Harvard, where he was Higgins Professor of Physics, before coming to Texas in 1982.