There is a problem with that. Is it actually possible to know history? If we cannot know everything that is happenning right at this moment in time, how are we to know everything that happenned before?
Thusly, the study of history is narrowly focused and frought with cultural/political bias. The tendency to "spin a good yarn" distorts history like waves distort the already vague water of time's reflection.
Fortunately, I see the study of history in acadeia as attempting to look beyond the god-elevating narratives of classic historiography to a broader recognition of the human experience in history. These areas of study include an increasing look at "the common man" and how he/she lived. It looks at the power and powerlessness of women. My personal favorite, it looks at the historical progrssion of the man vs. environment dynamic. It now accepts the works of anthropology, literary studies, poetry, music, art...
But something is still missing. I can't put my finger on it, but I think it has to do with the need to see linear progression and the need to compartmentalize in order to conceptualize.
Your thoughts on the purpose behind the study of history? How should the study of history change in order to become more beneficial to humanity?