My main field of research is the philosophy of physics, in particular the philosophy of quantum theory, where I have worked on a variety of approaches, including modal interpretations (for my PhD), stochastic mechanics, Everett theory, de Broglie-Bohm pilot-wave theory, and spontaneous collapse theories, with a special interest in the theory of decoherence. Other special interests include time (a)symmetry, probability and retrocausation. I also work on the history of quantum theory and have co-authored four books on the topic, including a widely admired monograph on the 1927 Solvay conference. I am currently engaged in research across a range of these subjects, including heading an ERC Advanced Grant on “Niels Bohr for the 21st Century”.