Peter Drucker is considered the father of modern management. He coined the term "knowledge worker" and believed that people and customers are an organization's most valuable assets. Drucker worked as a management consultant for major corporations. He received numerous honors for his contributions to management theory, including the Presidential Medal of Freedom. Successful organizations are defined by customer satisfaction, loyalty, profitability, market share, brand recognition, and perceived value. Management involves planning, organizing, staffing, leading, controlling, and motivating people to accomplish goals. The evolution of management in the US has been driven by wars, the industrial revolution, technology, and the rise of knowledge workers.