This document outlines the rationale for transforming India's planning body from the Planning Commission to NITI Aayog. It notes that India has undergone significant political, economic, social and technological changes in the past 65 years. It highlights key transformations like increased population, rapid economic growth, the rise of the private sector, globalization, the evolution of states, and advances in technology. Given these changes, the Planning Commission's structures and practices are no longer aligned with current realities. The document reviews calls from experts and past leaders to reform the Planning Commission so it can better serve India's development needs. It introduces NITI Aayog as the replacement institution to guide development in a changing India.