Barbarians need to be balanced: played in deity level ( so it helps AI, "cripples" player): w/o Raging barbarians even human player barely notes barbarians( yeah, without advanced start), AI expands pretty quickly. But Raging barbarians on: usually by turn 50 in huge map epic speed, deity, 4 or 5 civs are already dead. Human player CAN survive.
"barbarian world" option does not make the difference, but raging barb does.
"barbarian world" option does not make the difference, but raging barb does.