Descartes' enormously influential Meditations seeks to prove a number of theses: that God is a necessary existent; that our minds are equipped to track truth and avoid error; that the external world exists and provides us with information to preserve our embodiment; and that minds are immaterial substances. The work is a treasure-trove of views and arguments, but there are controversies about the details of the arguments and about how we are supposed to unpack the views themselves. This Companion offers a rich collection of new perspectives on the Meditations, showing how the work is...