One can't help but wonder if we're cycling out of the era of remarkable accomplishment for Western Civilization. Lots of the same mistakes are being made as the ones that collapsed Rome.
Indeed history repeats itself. We haven’t changed much physiologically in 10s of thousands of years (apologies in advance to those who think we’ve only been around for 6 thousand years). There are stories in Hindu mythology of flying machines and nuclear weapons. I believe we’ve been through this cycle many times and may continue to do so.
It's interesting to contemplate that the Battle of Senlac / Hastings was in 1066, while the Roman Empire continued in the east until the fall of Constantinople in 1453. Even if I accepted the idea of history repeating, I wouldn't be worried about it.