In the two Books ofDe divinatione Cicero considers beliefs concerning fate and the possibility of prediction: in the first book he puts the (principally Stoic) case for them in the mouth of his brother Quintus; in the second, speaking in his own person, he argues against them. In this new translation of, and commentary on, Book One - the first in English for over 80 years - David Wardle guides the reader through the course of Cicero's argument, giving particular attention to the traditional Roman and the philosophical conception of divination.