Roy Barzilai is an independent scholar and the author of several books, including The Testosterone Hypothesis: How Hormones Regulate the Life Cycles of Civilization. As a financial analyst for more than a decade, Roy became aware of the herd mentality in financial markets. He studied the Wave Principle of Human Social Behavior and the new science of Socionomics, focusing on how change in social mood affects society, its ideas, philosophy, culture, and economy. He holds undergraduate degrees from Tel Aviv University in Law, accounting, and computer science. https://testosteronecivilization.com/