This document discusses the history of development planning in India. It outlines how after independence, India adopted a socialist model of development under Nehru, establishing the Planning Commission in 1950 to formulate five-year plans. The National Development Council was formed to approve the plans and secure state cooperation in implementation. In 2015, the Planning Commission was replaced by NITI Aayog as the new development think tank and policy advisor to shift to a more cooperative federal approach engaging states. The document compares the roles and functions of the Planning Commission and NITI Aayog.