This period was characterised by the alternation of political power established in the Punto Fijo Pact; by the nationalisation of the oil industry in 1976 and the creation of PDVSA, the national oil and gas company; and by the rise of new social elites. Internationally, Venezuela became a founding member of the Organization of the Petroleum Exporting Countries (OPEC). The 1980s in particular were characterised by the flowering of art and culture and by the artistic development of the nation, especially in television.