Elite family networks with overlapping economic and political power have been a basic feature of Latin America. Their influence was characteristically strong during the late nineteenth and early twentieth centuries as the export economies expanded and national governments, particularly in the larger nations, advocated order and progress at the expense of participatory democracy. Historically, the influence of the elites has been primarily a regional phenomenon underpinned by ownership of land, mines, or lucrative commercial enterprises. They formed economic, political, and blood alliances to control production of vital products, monopolise local government and, on occasion, initiate bold entrepreneurial initiatives. Examples include the thirty families who dominated henequen production and local government in nineteenth-century Yucatán, the Grupo Monterrey who ran the industrialising economy of northeastern Mexico during the Porfiriato, and the Paraíba oligarchy who controlled cotton production, municipal government, and local tax revenues during the Brazilian Old Republic (1889–1930).