A break-away civilisation answers a lot of questions about lost history, antarctica, hidden/secret knowledge, modern advanced tech etc.
Back in the day, there were more than just Homo Sapiens, as explained here:
Figuring out exactly how many human species existed the planet at one time is not an easy task. We only have fossilised remains to track the number and the search for fossils is never-ending.
www.news18.com
According to Smithsonian, there are 21 recognised human species. But other papers list only 10-12 species as humans. Some lists don't include Denisovans while some don't have Homo naledi, a hobbit-sized human species discovered in Indonesian caves
This dates back over 5 million years and it wasn't until ~70k years ago that the cognitive revolution took place. That being us. We are the only known lifeform that has a concious aka 'Human' brain. No other Homo species developed this - as far as we can tell. The Neanderthals were supposedly the most intelligent non-sapiens, and while they looked and acted 'human' they were limited to the mammalian brain, so there were monkeys in their mind and humans in their looks.
What has this got to do with anything? Well, Mother Nature spat us out 70k years ago, in the proceeding 70k years, could a more polished, refined or even more evolved 'Human' have occured, either through natural, or unnatural means? Maybe there was another, more intelligent species, than humans, that were wiped out in a great flood and left only the odd scraps of writing. And during our exploration of the planet, we stumbled upon a small pocket of the survivors of this lost race?
After all, we are finding evidence of more and more Homo-species all of the time.
Researchers working in Israel have identified a previously unknown type of ancient human.
www.bbc.co.uk
Researchers found "an early divergence of the ancestors of pygmy hunter–gatherers and farming populations 60,000 years ago, followed by a split of the Pygmies' ancestors into the Western and Eastern pygmy groups 20,000 years ago."
Interestingly, we Humans didn't start the agricultural revolution until approx 12,000BC. Where we stopped hunter-gathering and settled down in to fixed villages, towns and farmships. Yet the pygmies did this 50k years before we did. Farming leads to towns, leads to cities, leads to the rise of technology.
When we look at what little we know, we can see that it isn't outside of the realms of possibility that a group of humans, as advanced or more advanced than us, exists or existed. If this group was discovered, integrated with humans, even unknowingly - Would an ancient explorer see a new race of humans and assume they're the same species? After all, Native Americans, Africans, Orientals and South Americans all look different, but are all Homo-Sapiens.
If this splinter group was assimilated in to the population of Homo-sapiens, and began rebuilding their society around 15th/16th centuries, they could be well ahead of the curve by now. They could even be survivors of the mythical Atlantis - a country supposedly containing humans of greater intelligence.
Now imagine that group in the modern era, 18th century - present. Would they, as a race of vast intelligence, cowtow and play around with the dumb Sapiens? No. In a way that most races see those with darker skin as inferior (not being racist, that's just the truth of the world), wouldn't this race of super intelligence see us as inferior? Sure they could trade with us, even have us do the manual work that we don't want to do - think of Africa, where people are used to extract the most valuable metals and minerals used for the richest in the world.
With their tight-knit clique community, all of the commodities in the world, Homo-Sapiens as their labourers, these intellectual supermen could spend all day every day advancing technology and, just like we cast off our old Iphone 5 to the 3rd world, so too do they cast off their old Microwave, Microchip and space-faring technology to us.
Where would they live, or be located? Their own fotress of solitude, known as Antarctica. With the right technology, it would be straight forward to live in a land of fresh water, fresh seas and of course, lush, green, fertile soil just beneath the ice.
TL;DR the 'elites' of the world are not Sapiens, but they are of the Homo genus. An Intelectually advanced race, that has lived for 100's of thousands of years, the survivors of the first great flood and inspiration of the epic of gilgamesh. A society who lived in an advanced city/country of Atlantis that was wiped out by said flood. The UFO's and avanced tech we see, is either them taking their new toys for a test drive, or demonstrating their 'old' tech to us.
