There is a reason for that; it is rather pointless to repeatedly regurgitate the past, while at least being smart enough to derive the lessons necessary.
Otherwise we are liable (as we can often see around us here) to remain hostage to the past.
Case in point: (i'm saying this only because the discussants on this sub-topic are IMO, wise enough) the Sino-Indian situation (including the dispute). Many people here (who were'nt even born in 1962) sound off so vociferously on the basis of little (second hand) knowledge.
Conclusion: History can be treated either like science as purely empirical facts (albeit complete facts) or be treated as literature, bordering on fiction or somewhere in between.
Ah, there lies the rub.
Some times it is better to see things deadened to some extent. Life moves on, but history really does not. It is a thing of the past. Useful but not over-riding.