Pirates and Emperors, Old and New: International Terrorism in the Real World is a book by Noam Chomsky, titled after an observation by St. Augustine in City of God, proposing that what governments coin as "terrorism" in the small simply reflects what governments utilize as "warfare" in the large. Yet, governments coerce their populations to denounce the former while embracing the latter. In the City of God, St. Augustine tells the story of a pirate captured by Alexander the Great, who asked him “how dare he molest the sea”. “How dare you molest the whole world” the pirate replied. “Because I do it with a little ship only, I am called a thief; you, doing it with a great navy, are called an emperor”.
Augustine's citation is from Book IV Chapter 4 of The City of God
In 2004, an online artist, Eric Henry and RES Media Group produced a humorous short web animation titled Pirates & Emperors (or, Size Does Matter), illustrating Chomsky's thesis.