They had laws and contracts stopping them from eating each other; this was something they had since before Zaros left Freneskae. And Zaros even mentions in Fate of the Gods that they weren't monsters, instead chasing up culture and art.
An interesting thing to note is that a common punishment they had for crimes was to be eaten. This means that the biggest, strongest and smartest Chthonians were the ones in government, and if a Chthonian desired power, they had to use loopholes in contracts and study very hard on bureaucracy. Which reminds me, if we ever get to go to Senntisten in the past, could we be able to do a Court Cases style D+D where we choose which party gets eaten? And since they chased art and culture, they could reward the player with various pieces for a gallery or museum which can be traded for a decent bit of money.Prepare for hell on RuneScape in Naval Cataclysm!
Chthonians aren't wild animals, they are quite sentient creatures.
I imagine it would be like saying "humans eat cows and chickens, why aren't random humans running up to the animal pens and taking a big bite out of them?". Just because there's something that you can eat sitting right in front of you doesn't mean that you have to try eating it.
1) Because it's the law. They WANT to eat each other, but their order keeps them from doing so.
2) Granted, they may not have a society anymore, since the avernic beat them, but since they are so outnumbered at this point, they might just be trying to stick together.Runescape doesn't need a hero...it needs a villain. An all encompassing force of evil that will remain ever-threatening and use chaos to make the peoples of Gielinor tolerate each other, grow strong together, and fight side by side against this evil. I am that villain.
The "law" is a fun and interesting take on/explanation of demons' love of contracts and trickery, btw. Since it's explained that the "law" actually implicitly encourages them to use loopholes and trickery to get to eat their fellow Chthonian demons. Presumably the Avernic demons picked up this trait from their masters, even though we haven't heard anything about them having the same desire to eat their own kind."You have heard that it was said, 'You shall love your neighbor and hate your enemy.' But I say to you, Love your enemies and pray for those who persecute you[...]For if you love those who love you, what reward do you have?
One thing to note is that Chthonian contracts are probably magically binding.
During "Mahjarrat Memories," Kharshai has the player sign an Imperial (that is, from the Zarosian Empire) gag order, that we won't tell anyone we've been helping him spy on the other Mahjarrat. It's quite likely that like the Empire's choice of language, this bit of enchantment is also borrowed from Infernus.
So it's not just that Chthonians refrain from spontaneously devouring one another, for fear of punishment by the Cannibalism Police - rather, they are physically incapable of doing so. Thus, even with their kind on the brink of extinction, Chthonian law enforces itself.
Also interesting to note is that the Avernic still utilise their old masters' contracts, though they seem mostly to use them in pacts with other races, not as a medium of intra-spsecies law.