u/Firel0ck

My particular situation is Pathfinder Campaign Traits, but really this could apply to any RPG that uses a similar mechanic to link the characters to the game world, or just players who create characters who are members of opposing factions.

My question is this:

I want to use campaign traits that are thematically linked to the campaign's competing factions, but I need a way to avoid the problem of having a PC group that's composed of members of factions that may be mortal enemies. I'd prefer to make this a house rule or game mechanic or otherwise codified, rather than something wishy-washy and open to interpretation. What are your ideas?