Most Indigenous peoples of coastal South America were devastated by disease and displacement in the century after Spanish conquest. The Huancavilca survived - not as a sovereign culture, but as a lineage woven into what Ecuadorians now call the Montubio population, the coastal farming people who settled the lowlands between the Andes and the sea. In the 2010 Ecuadorian census, 11.3 percent of Guayas residents self-identified as Montubio - a significant minority in a province where 67.5 percent described themselves as mestizo. Another 9.7 percent self-identified as Afro-Ecuadorian, descendants of Africans brought as enslaved laborers during the colonial period. The ethnic composition reflects centuries of mixing, but it also reflects the Huancavilca's refusal to disappear. Their legend of Guayas and Quil - the chief and his wife who are said to have set fire to their town rather than submit to the Spanish - is both origin story and proof of endurance.

Guayas is shaped by water. The Pacific Ocean forms the western and southern boundaries, meeting the coast at the Gulf of Guayaquil, the largest inlet on the Pacific side of the continent. The Daule River flows southward from the northern mountains, watering the fertile rice and banana plains along the way. The Babahoyo River flows in from the eastern highlands, carrying sediment down from the Andes. Where they meet, they create the Guayas River delta - a landscape of mangroves, estuaries, and brackish wetlands that host staggering wildlife. The province participates in the largest river basin on the Pacific side of South America. West of the small Coastal Range that begins in Guayaquil and runs northward, conditions turn desert-like; east of the range, the river basin is humid and fertile, with average temperatures around 30 Celsius in the wet season from December to May.

Guayas produces. Ninety percent of Ecuador's bananas grow in provinces like Guayas, El Oro, and Los Rios, and the province's humid tropical plains are particularly suited to the fruit. Cacao - chocolate - grows here too, among the oldest cacao-producing regions in the world; the "arriba nacional" bean, prized by high-end chocolatiers, is native to the Guayas watershed. Rice, coffee, and sugar cane round out the agricultural output. But perhaps the biggest economic transformation of the late twentieth century was shrimp. Vast areas of what used to be mangrove estuary have been converted into shrimp ponds, making Ecuador one of the world's largest farmed shrimp exporters and causing a long, continuing debate about environmental cost. The Port of Guayaquil handles roughly 70 percent of the country's private exports and 83 percent of its imports, making it one of the most important ports on the eastern Pacific coast.

When Guayaquil declared independence from Spain on October 9, 1820, the Guayaquil Department was enormous. It included what today are four separate provinces: Guayas, Los Rios, El Oro, and Manabi. The territory stretched down into what is now Peruvian Tumbes. That vast Guayaquil Department was subsequently carved up. Los Rios separated in 1860. El Oro separated in 1884. Santa Elena separated out in 2007. What remains as Guayas Province covers a coastal area roughly centered on the Gulf of Guayaquil and the lower Guayas River system, divided administratively into 25 cantons. Even reduced, it is the seventh largest province in Ecuador by area and comfortably the most populous by count - more than four million residents against populations of a few hundred thousand in most other provinces.

The map of Ecuador shows a country split between highlands and coast. For decades, migration has flowed from the countryside into the coast's largest cities, with Guayaquil serving as the primary magnet. The result is a metropolitan area that strains under rapid growth - shantytowns proliferating on the city's edges, many without reliable water or electricity, as rural families arrive faster than public infrastructure can follow. Santay Island, a small mangrove-covered island in the Guayas River connected to downtown by pedestrian bridges since 2013, represents one attempt at balance: an ecotourism destination a short walk from the city center, where visitors can see the mangrove ecosystem that used to cover much more of the delta. Beyond the urban core, the province still holds coastal fishing villages, banana plantations that extend to the horizon, and Huancavilca towns whose names have been known since before Spain arrived.