John Stewart Bell (1928-1990) was one of the most important figures in twentieth-century physics, famous for his work on the fundamental aspects of the century's most important theory, quantum mechanics. While the debate over quantum theory between the supremely famous physicists, Albert Einstein and Niels Bohr, appeared to have become sterile in the 1930s, Bell was able to revive it and to make crucial advances - Bell's Theorem or Bell's Inequalities. He was able to
demonstrate a contradiction between quantum theory and essential elements of pre-quantum theory - locality and causality. The book gives a non-mathematical account of Bell's relatively impoverished upbringing in Belfast and his education. It describes his major contributions to quantum theory, but
also his important work in the physics of accelerators, and nuclear and elementary particle physics.
Andrew Whitaker was awarded a BA in Theoretical Physics from the University of Oxford in 1967 and a PhD in the theory of nuclear magnetic resonance from the University of Nottingham in 1971. He lectured and carried out research at the University of Ulster until 1988, and since then at Queen's University Belfast, where he became a Professor in 1999. Much of his work over the last thirty years has been in the fundamental aspects of quantum theory, in particular the quantum Zeno effect and aspects of Bell's Theorem. He also has an interest in the history of science and has co-edited volumes on Kelvin, Maxwell and physicists of Ireland.