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Without going ASB, could a civilization with our level of technology or slightly higher, as many interpretations of Atlantis suggest, have existed? And could they have isolated themselves from the rest of the world, and furthermore, disappear without there being much evidence for today's society?

The big issue is resources and power generation. In order to power a high-tech civilization they would've had to mine for resources and fuel to power their machines. Yes, they could've used fusion or even antimatter for power, as some stories do mention a strange power source, but they would've used oil, or something similar, beforehand. You simply can't go from throwing stones to nuclear fusion/antimatter overnight. And they still have to mine for copper and materials for their machines.

With the above mentioned, they'd need more than the landmass of a large city to survive. With the hunger for resources they would've spread out to a good portion of the Earth, creating mining and oil colonies. With a global presence they'd have a hard time disappearing, at least without causing significant damage to the Earth itself.

There is one possibility, and it's that their island was large, about the size of Japan or Britain, and it had tons of oil and minerals. But the chances would be small, and they should still leave some evidence. (There aren't that many islands around that size, btw.)

Of course, there is another possibility. I did ask if it was possible for an advanced civilization to have exist, similar to Atlantis. Now, it doesn't have to be an island. What about a civilization on a continent?
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