evolutionary Party; PRI) is the largest and most important political party in Mexico. It was formed in 1928 as the Partido Nacional Revolucionario (National Revolutionary Party) and has been continuously in power since that time, although under several different names. Opposition parties exist, but not until the 1980's did they represent a serious challenge to the PRI. Chief among them is the Partido de Accin Nacional (National Action Party; PAN), a conservative, pro-Catholic group drawn primarily from the middle class and the Frente Democrtico Nacional (National Democratic Front, FDN), a coalition of leftist opposition groups. (Encarta, "Mexico") Culture Mexican culture is a rich, complex blend of Native American, Spanish, and American traditions. Rural areas are populated by Native Americans, descendants of the highly developed societies of the Maya, Aztec, and Toltecs, and by Spanish and mestizo farmers and laborers. Each of these heritages has enriched the regional culture. In the cities, both European and North American influences are evident. Most contemporary Mexican artists are striving to produce identifiably Mexican work that blends Spanish, Native American, and modern European styles. (Encarta, "Mexico") Economy Mexico reflects a shift from a primary-production economy, based on mining and agriculture, to a semi-industrialized nation. Economic achievements are the result of a vigorous private enterprise sector and government policies that have made economic growth a predominant objective. Traditionally, the government also emphasized Mexicanization of industry, and local control of companies engaged in mining, fishing, transportation, and exploitation of forests was required by law. More recently, however, foreign investment in new enterprises has been actively encouraged, and government controls on some sectors of the economy have been loose...