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Simon & Schuster, Inc. 1230 Avenue of the Americas New York, NY 10020 www.SimonandSchuster.com Copyright © 2018 by Dr. Guy Winch All rights reserved, including the right to reproduce this book or portions thereof in any form whatsoever. For information address Simon & Schuster Subsidiary Rights Department, 1230 Avenue of the Americas, New York, NY 10020 TED, the TED logo, and TED Books are trademarks of TED Conferences, LLC. First TED Books hardcover edition February 2018 TED BOOKS and colophon are registered trademarks of TED Conferences, LLC SIMON & SCHUSTER and colophon are registered trademarks of Simon & Schuster, Inc. For information about special discounts for bulk purchases, please contact Simon & Schuster Special Sales at 1-866-506-1949 or [email protected] For information on licensing the TED Talk that accompanies this book, or other content partnerships with TED, please contact [email protected]. Interior design by: MGMT.design Jacket design by: MGMT.design Illustrations by Henn Kim Library of Congress Cataloging-in-Publication Data has been applied for. ISBN 978-1-5011-2012-1 ISBN 978-1-5011-2013-8 (ebook)