Which is probably a good thing, because if it had been in the Bible, scholars and Freepers would spend considerable time arguing about exactly how much 'evil' vs. 'good' was in 'humanity'.
Salvations are individual. The salvation of a people, a country, can be spoken of metaphorically, but Jesus most definitely sends souls, that had been bound for hell, to heaven.
The “balance of good vs. evil” questions, if they even come up (as in Abraham’s attempt to bargain for the survival of Sodom) are symbolic. In Jewish culture, 10 competent men were needed as a witness, and that custom survives to this day in the number of men needed in a congregation before they will recite certain praises to God. If there was a viable witness in Sodom, God would pass it over and not destroy it. There wasn’t, and it met a toasty fate.