If I understand correctly, Thucydides actually called his book just History. If that is correct, then at what point did it become known as History of the Peloponnesian War? EDIT: Here is how he ...
in Ancient Sparta, record keeping and any kind of written history was forbidden by law. (src: http://history.stackexchange.com/a/5966/332 ) What was the rationale for such a law?