Peter Drucker was the first scholar to write about how to manage knowledge workers, with his earliest work appearing in 1969. Drucker addressed topics like management of professionals, the discipline of entrepreneurship and innovation, and how people make decisions. In 1982, Tom Peters and Robert Waterman wrote In Search of Excellence, which became an international best seller and ushered a business revolution by changing the way managers viewed their relationships with employees and customers. On the basis of the authors’ research focusing on 43 of America’s most successful companies in six major industries, the book introduced nine principles of management that are embodied in excellent organizations: