Book excerpt: Chicle is a history in four acts, all of them focused on the sticky white substance that seeps from the sapodilla tree when its bark is cut. First, Jennifer Mathews recounts the story of chicle and its earliest-known adherents, the Maya and Aztecs. Second, with the assistance of botanist Gillian Schultz, Mathews examines the sapodilla tree itself, an extraordinarily hardy plant that is native only to Mesoamerica and the Caribbean. Third, Mathews presents the fascinating story of the chicle and chewing gum industry over the last hundred plus years, a tale (like so many twentieth-century tales) of greed, growth, and collapse. In closing, Mathews considers the plight of the chicleros, the "extractors" who often work by themselves tapping trees deep in the forests, and how they have emerged as icons of local pop culture -- portrayed as fearless, hard-drinking brawlers, people to be respected as well as feared. --publisher description.