text: It really depends.  If you are talking about God, of the Christian aspect, there were NO other humans before he created Adam and Eve.  You can interpret the bible that when The great Flood in which Noah made the ark occured, The city of Atlantis could have been indeed sunk underwater.  Atlantis having existed doesnt mean that it was around before the first humans because of hypothesis that it was more "advanced".  go to www.answersingenesis.org  There are many questions answered scientifically with the Bible.  Good luck.