Sisti's superb book breaks new ground both in the study of Ramsey and in the theory of conditionals. Anyone working on these important topics needs to read Frank Ramsey's Theory of Conditionals. Cheryl Misak, University Professor and Professor of Philosophy, University of Toronto This book provides the first fully developed account of Frank Ramsey's theory of conditionals. It is divided into two parts. The first part of the book is historical, investigating Ramsey's texts to discover his views on conditionals. The second part systematically develops a unified account of conditionals, building on Ramsey's ideas. Caterina Sisti is a Postdoctoral Researcher at the Scuola Normale Superiore.