The Sodom Affect

Why would it be so essential to our understanding that from the history of Abraham in Genesis to the Revelation of the Apostle John at Patmos, that Sodom would be the example of evil itself?  Just as hell is the container of all evil and falsity in the spiritual world, Sodom is the representative of all the evil in one complex in the natural world, while Gomorrah is the falsity from that evil.