David Wallace is a philosopher of physics. In 2016, he arrived at the Philosophy School of the University of Southern California, after twenty-two years at the University of Oxford as a student, a researcher, and faculty member. Wallace’s original training was in theoretical physics. He took a Physics Ph.D. at Oxford before his interests took him towards more conceptual and foundational questions in physics, and from there into philosophy. He’s been particularly active in trying to develop and defend the Everett interpretation of quantum theory (often called the “Many-Worlds Interpretation”); Wallace’s book on the Everett interpretation, The Emergent Multiverse, was published in 2012. He also has philosophical and conceptual interests in quantum mechanics, quantum field theory, statistical mechanics, general relativity, symmetry, and gauge theory, and basically pretty much all of contemporary philosophy of physics.