The History and Evolution of the North American Wildlife Conservation Model - Hardcoverby Robert E. Wright (Author) This book explains how six policies collectively called the North American Wildlife Conservation Model (NAWCM), put in place around the turn of the twentieth century, saved numerous iconic big game species from extinction. Rigid adherence to the NAWCM, however, especially its ban on the commercial sale of wild game meat, has allowed deer and some other species to become overabundant pests in areas where hunting pressure