Scripture has an answer for every important question including the one you posed..... Matthew 13:13 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat: 14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
Well, I kinda already knew my answer. In the NT, the masses will burn in hell. Even most Christians. The mass majority of humanity and those of prehistoric times, will burn in hell.