The Lemurian (& Atlantis) continent was super developed by the time the reminder of the world was seen to even discovering fire.
the earlier discussion on this also discussed ice ages. the period that many claim to have a civilisation ,we should also analyse if the ice covered the continents.
Precisely, sinking of the super continents in sync with (Noah arc / Macha avatar whatever ) alterations of land mass and geographic patterns prompting an ice age. I still believe humans lived across the earth and only the super humans were able to communicate effectively by remote means.