If there was good evidence it wouldn’t be an unknown society 
You might be interested in some of Graham Hancock’s work in this area. In one of his books (Fingerprints of the Gods?) he makes a good case for a pre-flood civilization in what is now the Persian Gulf. Like how a bunch of the first cities in all of history have names like “New Bobtown” but there is no mention of any city named Bobtown. So how could there be a New Bobtown unless there was an Old Bobtown, which would have existed before known history.