 Like his friend Henry More, Ralph Cudworth spent his entire career as a teacher at the University of Cambridge, ending up as Master of Clare College. Cudworth published only one major work of philosophy in his lifetime, The True Intellectual System of the Universe (1678). Among the papers he left at his death, were the treatises published posthumously as A Treatise Concerning Eternal and Immutable Morality (1731) and his A Treatise of Freewill (1848). These papers also included two further manuscript treatises on the topic of ‘Liberty and Necessity’, which have never been printed.