A historian's an individual who studies and writes about history, and's regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all events in time. If the individual's concerned with events preceding written history, the individual's a historian of prehistory. Although "historian" can be used to describe amateur and professional historians alike, it's reserved more recen… (More on Historian)