Note on Transliteration -- Acknowledgements -- Introduction -- Determinism: the problem and some historical aspects -- Contemporary scholarship on Avicenna and Averroes with reference to the issue of determinism -- Synopsis -- Chapter One Avicenna on chance -- Introduction: chance and causality -- Chance and the frequency of events -- Chance and evil -- Conclusion -- Chapter Two Avicenna on matter -- Introduction: the relation between matter and chance -- Matter and the material cause -- Matter and the material compound. Prime Matter -- Origin and preparation of matter -- Matter and desire -- Conclusion -- Chapter Three Avicenna on celestial causation and providence -- The necessary and the possible -- Emanation -- Causation in the supernal world: desire -- Divine providence -- God's decree and determination: al-qadà' wa-l-qadar -- Conclusion -- Chapter Four Averroes on chance -- Introduction -- Chance and the frequency of events -- Chance: between the efficient and the final cause -- Averroes' criticism of ancients schools and of Avicenna concerning chance -- Conclusion -- Chapter Five Averroes on matter and necessity -- Matter and potentiality, privation and desire -- Necessity and possibility -- Averroes versus Avicenna on necessary and possible beings -- Conclusion -- Chapter Six Averroes on celestial causation and providence -- Introduction -- Emanation, final causation and creation -- Providence, evil and God's decree and determination -- Conclusion -- Conclusion -- Bibliography -- General Index -- Index of Main Passages.