"In my view this work will turn out to be a milestone in the project, now already 30 years old, of modal interpretations." Studies in History and Philosophy of Modern Physics
Standard quantum mechanics is not a theory that describes the outside world. Rather, it only predicts the probabilities with which measurements have outcomes. However, quantum mechanics is a fundamental theory of nature, and attempts have been made, therefore, to interpret the theory as a description of the world. This book is a survey of the so-called modal interpretations of quantum mechanics, proposed during the 1970s and 1980s, and more fully developed in the 1990s.