Book excerpt: In this fascinating tour through cultural, global, economic, and business history, icon of the financial world Robert Menschel explores the phenomenon of crowd psychology and its effects on business and culture. Explaining how crowd psychology creates market bubbles and irrational exuberance, Menschel mines world history—from the rise of the Nazis in Germany, to the fanatical love of brands, to the Dutch tulip craze of the seventeenth century, to America’s 1990s Internet bubble—to reveal how the behavior of crowds negatively affects the business world. Championing the causes of individuality and common sense, Markets, Mobs & Mayhem offers real wisdom for investors who want to keep their wits when everyone else is losing theirs.