This book is the first history of Silicon Valley from 1900 to the 2010s. It is a comprehensive study of the greatest creation of wealth in the history of the world, from the establishment of Stanford University to the age of social media. The underlying objective is to find the reason why it was Silicon Valley, and not some place on the East Coast or in Europe, that became the creative technological hub of the 21st century. Silicon Valley did not happen in a vacuum: the book also explores the surrounding social and cultural environment of the Bay Area. This "green" book follows the "red book" od 2012, which was the (sold out) first edition coauthored with Arun Rao, and the "blue book," which was Arun's proof-edited and expanded second edition of all chapters. The 600-page blue book is still available and contains both my old chapters and Arun's chapters. This 500-page green edition contains only my chapters (basically, the chronology) updated to 2015 and with many additions to early chapters and a new chapter on Asia.