This document provides a summary of the changing dimensions of human resource management over time. It begins with definitions of HR and discusses its origins in ancient civilizations. It then outlines the role of guilds in the Middle Ages and the emergence of modern HR with the Industrial Revolution. New approaches to HR emerged like scientific management and the Hawthorne studies. HR increasingly became a strategic function linked to business operations. International HR also developed to address globalization. The document traces the evolution of the HR field from early civilizations to modern strategic approaches.