The document traces the evolution of human resource management from early craft systems through the industrial revolution, scientific management, trade unionism, and human relations movement. It discusses key individuals and concepts that shaped the field, such as Robert Owen, Charles Babbage, Frederick Taylor's principles of scientific management, Hawthorne studies showing the importance of workplace relationships, and Douglas McGregor's Theory X and Theory Y. The conclusion states that as a result of these developments, human resource management became more closely linked to core business operations.