I agree, we must preserve, study, analyze and spread history; otherwise, the most outrageous "omissions" can be made and we'd be doomed to repeat the mistakes of the past.

Ironically, though, the Nazi holocaust, which is one of the most/better documented ones, is also one of the most controversial ones. We have countries like Iran blatantly denying that such a thing ever happened, and many people around the world, moved by ideological sympathies more than by evidence and reason, buy into that narrative and set up the stage for future holocausts.

I am not very optimistic about the future of humanity, even though science and technology, especially those used in media outlets, promised us a lot in terms of tools to record and preserve history. There is a lot of audio and video evidence of crimes committed worldwide; well, that has not done much to even stop those crimes from continuing being committed, let alone to stop similar crimes elsewhere.

After millions of Jews were killed, many other peoples have. You mentioned the Armenians. There were also the Tutsis in Rwanda butchered by the Hutus. And the list goes on and on. One of my greatest fears, and I believe the technology and the twisted minds are out there to make it a dark reality, is that, as it happened in Orwell’s novel (1984), dictators and criminals will eventually delete or altered any record we think we have and thus be able to rewrite history in any form they please.
The blockchain has been offered as a promising alternative or even remedy to that kind of totalitarianism. I hope it can actually delivered that promise.