Man has been living on this planet some 50,000 years. Jesus appeared 2000 years ago to save mankind and Mohammed appeared about 1400 years back. What of those countless millions of men that died before Christ or Mohammed came to save the world from damnation? If the Christian creed, that except a man believes in the Lord Jesus Christ he cannot be saved, is maintained, or the muslim beliefs that only those who "submit to the Allah" have a chance to enter the "Paradise" then it must be that those millions of human beings who lived before Christ or Mohammed and had no chance to believe, are in hell-fire.
