High Quality Content by WIKIPEDIA articles! While there is universal agreement that some Mesoamerican people practiced human sacrifice, there is a lack of scholarly consensus as to whether cannibalism in pre-Columbian America was widespread. At one extreme anthropologist Marvin Harris, author of Cannibals and Kings, has suggested that the flesh of the victims was a part of an aristocratic diet as a reward, since the Aztec diet was lacking in proteins. According to Harris, the Aztec economy would not support feeding them as slaves and the columns of prisoners were "marching meat". At the other extreme, William Arens doubts whether there was ever any systematic cannibalism.