So you mean GUILDS? Not the thieves type, even though they were not all totally lawful.
Was thinking that geography has a lot to play with society. If the Goblins once lived in the fertile lands and were bumped out to the desert, things had to change. Racially they are the same a Goblin that always lived under the lizards and one that run to the desert. Socially there a big differences.
The desert is very harsh, does this change their demeanor, diet, even physically? Middle Easterns live in the desert and they are of a unique skin tone. Not quite Indian or African. Culturally they are very different than both societies even though the middle east shares a border with both.
Tool, clothes, houses...are they nomadic. Factors that will add a reality to a game.
Now you know why I create sop many campaigns and get burned out before completion. In this case I have you to bounce my ideas off of.