They don't require food and they don't die of old age. Starvation and dieing of old age are very important evolutionary tools. Their idiots live forever and are probably breeding constantly because they don't have to concern themselves with acquiring food for themselves or their offspring. A large portion of human cognition that relates to social interaction and planning ahead is the result of millions of years of needing to eat and pass on your DNA before you croak.
Thats...surprisingly insightful and scientific-sounding, for talking about an in-game creature.
Yeah, he was going well until he said "human cognition". Human cognition? HUMAN COGNITION?! Why not Dwarven cognition?! Where the survivor is the one who can avoid horrid wonderful daycare with vicious mutts cuddly puppies. Escaping the grasp of the Giant Cave Spiders, and Urist McMandate's... Mandates. Ability to retrieve a -pigtail fibre sock- in the middle of a battle field, and the stomache to eat nothing but mushrooms for an eternity. That is what makes true Dwarves! Also beards, beards which filthy Goblins lack! (Well, atleast impressive ones).
To be fair...dwarves have to procure food but their idiots still reproduce like crazy. That could be attributed to alcohol though.
Humans seem to be a bit more reasonable than all the other vanilla races. Keyword "bit".
EDIT: Okay, I edited my Vrykul civ to start in cities, removed the [EVIL] tag. Two observations (that more than likely apply to the goblin hostility problem as well):
-If you're a vrykul yourself they won't attack you at all, even the warriors
-If you're not one, the townsfolk will leave you alone, but the warriors will still try to maim you. Even if you're supposed to be a member of their civilization, you'll still die if you're an animal man. Visitors also get no mercy and I believe they're attacked by everyone equally - saw some dead visitors at a tavern.
I am guessing this is due to a race's personality and moral values - violence and anger propensity I'd imagine are partially responsible for this behavior in goblins, those values are set pretty high in their raws, so they start fights randomly, or maybe due to arguments on their conflicting morals.
I'll do more science soon enough, like changing goblin sites to cities and seeing how they interact with visitors and such.