Reason and Rationality This page intentionally left blank Reason and Rationality Jon Elster Translated by Steven Rendall princeton university press Princeton & Oxford Copyright © 2009 by Princeton University Press Published by Princeton University Press, 41 William Street Princeton, New Jersey 08540 In the United Kingdom: Princeton University Press, 6 Oxford Street, Woodstock, Oxfordshire OX20 1TW All Rights Reserved Library of Congress Cataloging-in-Publication Data Elster, Jon, 1940– [Raison et raisons. English] Reason and rationality / Jon Elster ; translated by Steven Rendall. p. cm. Includes bibliographical references. ISBN 978-0-691-13900-5 (hardcover : alk. paper) 1. Practical reason. 2. Rational choice theory. 3. Philosophy and social sciences. I. Title. BC177.E4713 2009 128'.33—dc22 2008029705 British Library Cataloging-in-Publication Data is available Th is book has been composed in Adobe Garamond and Goudy Trajan Printed on acid-free paper.∞ press.princeton.edu Printed in the United States of America 1 3 5 7 9 10 8 6 4 2 < Contents > Reason and Rationality Works Cited v This page intentionally left blank Reason and Rationality This page intentionally left blank = In analytical approaches to human behav- iors, the same Latin word, ratio, is at the root of two intellectual traditions that are at once very diff erent and interconnected. On the one hand, there is the tradition that opposes reason to the passions and, more recently, to interests. Seneca’s trea- tise On Anger, for instance, is organized around the opposition between reason and passion, whereas the French moralists of the seventeenth century added the notion of self-interest. La Bruyère, in a famous