[quote=@Regitnui]
[@Mercenary Lord], The High Island could crush all of his rivals in seconds, the High Electric could vaporise them, the High Venom could unleash a horrid, genetically targeted rotting sickness, and the High Prescient would see it coming from a year off at least. Mutually Assured Destruction keeps them all in check. They all like ruling, and they're all smart enough to know a showdown wouldn't leave much left to rule.
[/quote]

^ This.

When you can kill the others, but die shortly after, was there a point in killing them?  The High aren't stupid, at least.