3 Nephi 9
I wonder if there was greater wickedness and thus greater destruction, or destruction of a greater part of the population among those who lived within the cities (especially larger cities). This is pure speculation, but I could conceive that those who lived outside the cities, keeping to themselves and living off of the land through their hard work would be less prone to wickedness unto destruction.
On more concrete ground, the invitation here by the Savior to come and be healed and saved is among the most poignant and inviting among all of scripture to me.