The document summarizes the evolution of the national extension system in India after independence. It discusses the initial community development projects launched in 1952 to strengthen rural development. This was followed by the establishment of community development blocks in 1954 and panchayati raj system in 1957, which institutionalized democratic decentralization through a three-tier system of governance at the village, block and district levels. The document outlines the functions and organizational structure of gram panchayats, panchayat samitis and zilla parishads under the panchayati raj system.