When player leaves game, setting faction to not make any alliances/wars?

[3inar]

Title says it all. When player leaves game is there a way to setting faction to not make any alliances/wars?

I remember doing this in a multiplayer when stellaris launched but i'm lost on where I find it. It is rather important as I Want to host a long term MP so if a player leaves the game AI won't make any new alliances or declares wars on previous player allies.

Thanks in advance /Erik

 

[Galverizer]

It won't for the first 30 years after the player have left. But I'm presuming 30 years is a bit short you will play longer then that if you play 5h. Play on hard then the AI don't ruin the faction.