<<We are what we are to a large degree from HISTORY. That means we should concentrate on the classics, in my mind primarily Greek and Roman literature.>>
I would agree with you up to a point, so I am not arguing that the Greek and Roman stuff be cut completely. It's more a question of weight and emphasis. The St. Johns list was overloaded with Greek and Roman and could have been heavier on the post-1789 stuff. Greece gave us the framework for our present civilization but there are limits to the amount of detail we need to know of their world. A good biography of Huey Long, for instance, would give us a lot more background about Louisiana today than any ten works from ancient Greece or Rome. Background is important to understanding, but recent background is more informative than remoter background in most cases.
IMHO, one of the reasons that the remoter sources are valued by the more conservative institutions is that they are by nature less controversial; the more recent analyses are more directly related to contemporary issues and the conservatives have a lock on the general public discussion of many current public issues.
"Duty, honour, country," for example, are generally treated as sacred cows in the U.S.; they are what permits debate over the war to be silenced for many by turning it into a debate over "supporting" or "not supporting" the troops; the troops, as it happens, are virtually immune from public criticism because they are the noble followers of a noble creed (duty, honour, country) and so to many people an attack perceived to be on them is totally off limits, beyond the bounds of decency, etc. "Duty, honour, country" CAN be debated in a sanitized environment, for example, the Greece of Sophocles' "Antigone," where the issue is not whether to torture prisoners, or abuse civilians, but whether Antigone should give her late brother a proper funeral despite the wishes of the ruler, Creon. Here the issues can be debated but in a context which poses little danger of the conclusions being extrapolated to the actual conflict in Iraq, leaving the conservative lock on the issue relatively undisturbed.