Factions

In every game of Rimworld there are 5 on world factions, two are pirates which are generally hostile, then there is 1 tribe, either can be hostile or friendly and there are two trader factions which are friendly, there is also a mechanoid faction but there are not on the map or have bases and lastly a space refugee faction, the space refugee faction is not on the map but drop in escape pods which can be recruited. Your actions depend on what happens for factions, you can gift factions silver which increases relationship and can turn hostiles friendly but this is can be same in reverse where you can arrest traders or attack them which can turn factions hostile.