In 1961 Nikita Khrushchev, the Soviet leader, put forward proposals for establishing an integrated, centrally planned socialist commonwealth in which each geographic region would specialize production in line with its set of natural and human resources. The resulting document, the "Basic Principles of the International Socialist Division of Labour" was adopted at the end of 1961, despite objections from Romania on certain aspects. The "Basic Principles" were never implemented fully and were replaced in 1971 by the adoption of the "Comprehensive Programme for Further Extension and Improvement of Cooperation and Development of Socialist Economic Integration".