Basil J. Hiley is Emeritus Professor of Physics in the Theoretical Physics Research Unit at Birkbeck, University of London. His main interests are the foundations of quantum theory and relativity. He is investigating a process-based theory of pre-space with a specific aim of developing a quantized form of general relativity. He also has interests in exploring the possibility of finding a theory of the relationship between mind and matter. He has written over one hundred research papers on fundamental questions in quantum mechanics and on the relationship of mind and matter. With the late Professor Bohm he has co-authored The Undivided Universe, Routledge, London, 1993. He is also co-editor with David Peat of Quantum Implications, Essays in Honour of David Bohm, Routledge, London. 1987.