[mmcdermott]

It's hard to know how predominate views will change, but it is certain that they will change. If views change, the future generations must, by necessity, see us as wrong on some dimension(s) or else their views would have remained the same.

So I think the need to be able to look at past generations and "hear them out" (i.e. not cancel them, take the good, leave the bad, etc.) is important regardless of how well we project out the future.