Ross Hassig (born December 13, 1945) [1] is an American historical anthropologist specializing in Mesoamerican studies, particularly the Aztec culture. His focus is often on the description of practical infrastructure in Mesoamerican societies. He is the author of several influential[citation needed] books, among them: Time, History, and Belief in Aztec and Colonial Mexico; Aztec Warfare: Imperial Expansion and Political Control; and Trade, Tribute, and Transportation: The Sixteenth-Century Political Economy of the Valley of Mexico.