Below is the Introduction from Professor Glaeser's best selling book, Triumph of the City:
Copyright Notice
"Introduction: Our Urban Species" from TRIUMPH OF THE CITY: HOW OUR GREATEST INVENTION MAKES US RICHER, SMARTER, GREENER, HEALTHIER, AND HAPPIER by Edward Glaeser, copyright © 2011 by Edward L. Glaeser. Used with permission of Penguin Press, an imprint of Penguin Publishing Group, a division of Penguin Random House LLC. All rights reserved.