Venezuela (1980-1981)
The late Ambassador Manuel Perez-Guerrero (Venezuela), who served as Secretary-General of UNCTAD in the late 1960s and early 1970s, held four different ministerial posts, namely Finance, Planning, International Economic Affairs and Mines and Hydrocarbons. He also played a decisive role in the establishment of OPEC in 1960 and the nationalization of the Venezuelan oil industry in 1975. In 1975-1977 he was Co-Chairman of the Conference on International Economic Cooperation (the so-called North-South Dialogue), held in Paris.