Dr. Mahboob-ul-Haq transformed global thinking about development by arguing that economic growth alone does not guarantee a better life. He emphasized that true development means enabling people to live long, educated, and meaningful lives. His Human Development concept later formed the basis of the Human Development Index (HDI), which evaluates countries using life expectancy, literacy, and income levels. While Amartya Sen contributed to capability theory, the primary idea was introduced by Dr. Haq. Ratzel mainly worked on environmental determinism, and E. C. Samuel contributed administratively, making Dr. Haq's work the foundation of Human Development.