David Wallace is a philosopher of physics at the Philosophy School of the University of Southern California, after twenty-two years at the University of Oxford as a student, researcher and faculty.

Wallace’s original training was in theoretical physics: he took a Physics PhD at Oxford before his interests took him towards more conceptual and foundational questions in physics, and from there into philosophy.

Wallace’s research interests are mostly in the philosophy of physics. He has been particularly active in trying to develop and defend the Everett interpretation of quantum theory (often called the "Many-Worlds Interpretation"); his book on the Everett interpretation, "The Emergent Multiverse", was published in June 2012. But he also has philosophical and conceptual interests in quantum mechanics, quantum field theory, statistical mechanics, general relativity, symmetry and gauge theory, and all of contemporary philosophy of physics. Outside philosophy of physics, I'm interested in emergence and reductionism, in structural realism, and in decision theory.