The ancient Maya and limestone

Abstract

This article posits that the ancient Maya were uniquely advantaged by the limestone bedrock of their homeland, the Yucatán Peninsula. This happenstance was unintentional, but limestone provided a resource that helped promote Maya society to become a civilization. The most significant innovation was the elevation of one cultivated plant, maize, to the role of a dietary staple, which was made possible by nixtamalization, an innovative processing technology that increased the plant’s nutritional value. Nixtamalization relies on soaking maize kernels in an alkaline solution, which the Maya usually made with burned limestone. Before maize became a staple, earlier prehistoric Maya likely cultivated many crops, with maize among them. The consequent dietary and intense cultural focus on maize by later prehistoric Maya blinded researchers from recognizing that the earliest Maya on the peninsula were broad-spectrum farmers.