I strongly suspect that I know at least as many professional historians as you do and quite probably a great many more. But who’s counting?
Which hardly begins to address the problems involved in archival management. A single ATM receipt could indeed be vital evidence for a future historian. I can easily imagine someone citing such a receipt to clinch a major debate. After all, it is excellent evidence to place a specific person at a specific place at a specific time. But does that mean that every ATM receipt needs to be kept? Space is the least of the problems. Who would catalogue them? More importantly, would any historian ever think the effort of searching them was worth the likely value of what they would find? Of course, it’s easy to say that only the important ATM receipts should be kept. But who’s to say which are the ‘important’ ones? Historical agendas change. Past experience suggests that predicting what people in the future will think is important is no less haphazard than assuming that it’ll be what we think is important.
As it happens, one of the most common types of documents found in family archives from the period before banks became common is the equivalent of ATM receipts, namely receipts by which one individual acknowledges that they had received a cash payment from the person who retained the receipt. Hundreds of thousands, possibly millions, of these survive. And some historians do use them. Or rather they use some of them. They’ll browse through them en masse and spot the one or two that interest them. A few historians study individual collections in depth. But no professional historian seriously thinks all such documents will ever get used individually. The same point applies even more emphatically to other useful but even more numerous documents, such as land deeds or court records.
This is the paradox involved in any large-scale archival research. The skilled historian is the one who knows which documents to ignore. The number of documents such an historian will consult will always be only a fraction of the documents they know could conceivably be relevant. Only by ignoring some can they ever begin to get to grips with what survives. Research involves time and effort. There is always a limit to what historians, individually or collectively, can consult.
Like most documents surviving in archives, such receipts were not kept for the benefit of future historians. They were kept by the original owners for their own use and it just happened that they were never thrown out. But most were thrown out. Except that this doesn’t reduce what value there is in some of those that do survive. Historians’ ability to study the past doesn’t depend on everything being saved. It doesn’t even depend on most of the ‘important’ things being saved. All that would mean would be that there would be even more for historians to ignore. The physical impossibilities of consulting more than a fraction of what survived would still kick in.
But I went on to give examples of primary source documents by John Paul II, some of them private ones, which would have survived anyway. And what any historian would actually tell you is that the value of a primary source need not be greater than another person’s perception. It all depends on the individual and on who the other person is. Even documents someone writes for their own use with the intention that no one else should ever see them can mislead.
Which completely misses my point. Of course the small details matter. History is all ultimately about small details.
But not all small details survive. Nor can they. Nor is it just the unimportant small details that get lost. That is precisely the reason why professional historians learn to accept that they do not, and indeed cannot, have all the small details they might wish. They usually think themselves lucky if they have just some of the relevant ones.
Not having all the details is the necessary condition of any historical research. The whole point about history as written by the professionals is that it aims to be the best attempt at a fair and accurate account with the details that do survive, or rather with the details that the best and most assiduous efforts of that historian has been able to gather. No historian ever writes anything without thinking that there was once evidence which, had it survived, would have added to their account. But they’re historians. They know why records get lost and that this is because of chance and, yes, because people often deliberately destroy them. It goes with the territory.