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Library of Congress Cataloging-in-Publication Data

Lieberman, Philip.

  The unpredictable species : what makes humans unique / Philip Lieberman.

      pages    cm

  Includes bibliographical references and index.

  ISBN 978-0-691-14858-8 (cloth : alk. paper)  1. Brain—Evolution.  2. Human evolution.  3. Evolutionary psychology.   I. Title.

  QP376.L563 2013

  612.8′2—dc23         2012037744

British Library Cataloging-in-Publication Data is available

This book has been composed in Electra

Printed on acid-free paper. ∞

Printed in the United States of America

10 9 8 7 6 5 4 3 2 1