Despite its groundbreaking subject matter, Introduction to the Wave Principle is designed to appeal to a wide audience. Social scientists will understand the importance of the Wave Principle. Investors will want to add it to their tool kit. Business professionals will find it useful in anticipating business cycles, which are based on mass psychology. An excellent resource for professors and students wishing to explore the connection between social mood and events and how those relate to the stock market. Topics include: Possible biological basis for such a phenomenon Human characteristics and attributes that waves appear to reflect Connection between social mood and events and its direction of causality Aspects of history and culture that relate to the trends of social mood Influence, if any, of outside forces Extent in history that the pattern extends Possible wider implications of the pattern Current position of human history in the fractal pattern and its implications for future trends