books.google.com.hk - Do civilizations independently invent themselves or are they the result of cultural diffusion? The contributors to this volume do not attempt to provide a definitive answer to this contentious question, one of the most debated issues of the past century. Instead, they shift the focus from theory to reality...http://books.google.com.hk/books/about/Contact_And_Exchange_in_the_Ancient_Worl.html?id=8-OilJCX1moC&utm_source=gb-gplus-shareContact And Exchange in the Ancient World