Things They Should Invent: prominently indicate on monuments the year they were built

Disclaimer for this post: I saw something, I had an emotional reaction to it, and that ultimately led to an invention that I'm blogging. I don't have enough knowledge to know if my emotional reaction was founded or not and haven't done the research, but my point for this post is to explain the reasoning for the invention.

Walking down University Avenue, I noticed that the great big war memorial thing has old-fashioned colonial names for places in Africa on it. I thought it was a generic cenotaph - never really gave this much critical thought - but it turns out it's a Boer War memorial.

That makes me vaguely uncomfortable. From what little I remember from history class, my impression of the Boer War is that it was hella colonialist, with a goal of claiming or keeping parts of Africa for Britain. I'm not really comfortable with the idea of a massive epic monument to warmongering in the name of colonialism and the glory of the empire displayed so prominently in my city, especially since my Toronto welcomes newcomers from all over the world, including the parts of Africa memorialized here by being carved in stone under their colonial names.

But, at the same time, it wouldn't do at all to take the monument down or edit it. It is a memorial to actual specific dead people who still have living descendants. It's also a well-executed piece of public art, and a historical artifact from the Victorian period. All of these are perfectly valid reasons for letting a monument stay where it is.

I understand why this heroic colonialist sentiment was expressed at the turn of the 20th century, and I'd have no qualms about the monument if it was clear "This is what people thought in the early 1900s." It's actually important to know what and how they thought of colonial wars back then. But my concern is that it seems, to my eye at least, to be saying that we still think the sentiment is unwaveringly relevant and appropriate. If only there was some way to put an asterisk on monuments saying "The ideas expressed here are those of their era and do not necessarily reflect the society of today."

So here's the solution: Every time they put up a monument, they include a readily visible cornerstone or plaque clearly indicating the year when it was commissioned or erected. It would work like the cornerstone on a building. You know how if you go past an old building you sometimes think "Hey, an interestingly old building!" and look for a cornerstone to see how old it is, but if you live or work in the old building it's just your home or your office and its age isn't especially relevant? The monument would work the same way. If it's still relevant and pertinent to observers and therefore fulfilling its original intended function, no one will pay any particular attention to the cornerstone. But if time passes and the monument becomes less relevant, the cornerstone will mark it as from the past, and anyone wondering "WTF, Rhodesia?" will see that it's over 100 years old and interpret it as a historical document.