With all the ferment over copyright law currently, I don't understand why someone hasn't pointed out that from a recordkeeping perspective, tying copyright law to author lifespan is an incredibly bad idea, amounting to an immense research tax on would-be preservers and reusers of culture.
I was recently asked about reuse of a published photograph by Paul Regnard, a French psychologist. Don't bother with Wikipedia; he doesn't have an article there, nor was he important enough to make the pages of the scientific and medical biographical dictionaries I could lay hands on. It is possible to triangulate via Google and some fossicking about that he died in 1927.
So French copyright terms, as best I can tell, currently mirror ours (life plus seventy years), with one wrinkle: if you died in active service, your copyright term lasts an extra thirty years. (What was French copyright law like in 1927? When the term was extended to its current length, did the extension apply retroactively? Darned if I know. If anyone would like to enlighten me, feel free.) So if Regnard died in active service, his photographs are still copyrighted. If not, not.
I'm not planning to investigate 1920s service records for France. I'm just not. So there the matter rests.
Frankly, as a pragmatic tradeoff I'd accept a longer copyright term (odious though that would be) in exchange for a more precise one, such that I wouldn't have to fuss about French service records. I mean, merde.