Herodotus is often credited with the honorific title of “Father of history.” If this title has often been the object of debate in modern scholarship–with noticeably certain unrealistic details which have made some give him the inglorious name of ‘Father of lies’, and the fact that he lumps his sources without necessarily criticizing them–Herodotus’ place as the first historian seems today assured against his critics. Yet, more than just an historian, Herodotus was also an ethnographer and a geographer. His Histories, indeed, very often digress from the central subject, the war between the Greeks and the Persians and their allies, toward vivid accounts of the peoples he mentions and their customs, religion, political system, etc. He also spends time in locating them on the map of the known world, describing the landscape he encounters, its rivers, mountains, etc.
In all, the Histories are not so much an historical work in the modern sense of the term as they are a witness of his time, where the world is an integrated whole. In Herodotus, human tragedy unfolds in a dynamic world, made not (only) of speculations and theories, but where every elements cannot exist without the other. Thus, the Scythians or Carthaginians have their place in Herodotus’ work not simply as elements of the narrative, explaining such event, but they exist in their own right, with their customs and environment. The Greek historian is curious and inquiring; so is the modern historian. But the Greek, unlike his modern counterpart, pushes his curiosity to areas irrelevant to the modern historian, who would leave those to other professionals, such as ethnologists, geographers, etc.
The separation between the various liberal arts–history, geography, anthropology, sociology, etc–is a recent one, dating to the 19th century, even if those started as independent specialties earlier. I would assume that this separation is due to the modern scientific mind which seeks to break every element down to its smallest component possible, and study these elements separately. In this respect, everything that does not directly contribute to the study of the element becomes discarded, useless. This is why a modern historian does not bother himself so much with ethnographic or geographical details. To Herodotus, however, these were important in that they responded to his curiosity for the world. To us, the element counts; to him, and to all ancient historians in fact, the whole is important.