quality:corruption
Cotton and food sources

The use of cotton (of the species Gossypium barbadense) played an important economic role in the relationship between the inland and the coastal settlements in this area of Peru. Nevertheless, scholars are still divided over the exact chronology of these developments.

Although not edible, cotton was the most important product of irrigation in the Caral–Supe culture, vital to the production of fishing nets (that in turn provided maritime resources) as well as to textiles and textile technology. Haas notes that "control over cotton allows a ruling elite to provide the benefit of cloth for clothing, bags, wraps, and adornment". He is willing to admit to a mutual dependency dilemma: "The prehistoric residents of the Norte Chico needed the fish resources for their protein and the fishermen needed the cotton to make the nets to catch the fish." Thus, identifying cotton as a vital resource produced in the inland does not by itself resolve the issue of whether the inland centers were a progenitor for those on the coast, or vice versa. Moseley argues that successful maritime centers would have moved inland to find cotton.

In a 2018 publication, David G. Beresford-Jones with coauthors have defended Moseley's (1975) Maritime Foundations of Andean Civilization (MFAC) hypothesis.

The authors modified and refined the Maritime Foundations of Andean Civilization hypothesis of Moseley. Thus, according to them, the MFAC hypothesis now "emerges more persuasive than ever". It was the potential for increased quantities of food production that the cultivation of cotton allowed that was the key in precipitating revolutionary social change and social complexity, according to the authors. Previous to that, the gathering of bast fibers of wild Asclepias was used for fiber production, which was far less efficient.

Beresford-Jones and others also offered further support for their theories in 2021.