As the mod description indicates, achieving this could prove easy to do since this mod only modifies a few line of code. The hardest part should be finding the file and following the rules of the game.


These instructions will show you how to modify my mod
Step 1: Open your steam folder then navigate to this address, (the address of my mod):
steamapps\workshop\content\445220\2416624076
Step 2: Open the only folder there and keep opening folders until you find the factions.lua
file.
Step 3: Open factions.lua

From there you should see among other things the line:
traits = {
{name = "aggressive", from = 4, to = 4},
{name = "brave", from = -3, to = 3},
{name = "greedy", from = -3, to = 3},
{name = "honorable", from = -3, to = 3},
{name = "mistrustful", from = -3, to = 3},
{name = "forgiving", from = -3, to = 3}
},
All I did was force aggressive to equal 4 on every line where aggressive appeared equal some number

Now if you want to force a different trait to be in every faction then all you need to do is do what I did to the aggressive trait to your respective trait.

Just don't modify anything other then what I am saying to modify and the mod should work just fine.

Here is a list of every trait in the game and their opposite traits:
"peaceful", "aggressive"
"careful" "brave"
"generous", "greedy"
"opportunistic", "honorable"
"trusting", "mistrustful"
"forgiving"

If you want a peaceful galaxy then just set aggressive to equal -4 on every line I made it equal 4.

When you are done just save the file and close it and start the game. At this point you would have successfully modified your copy of my mod. So just make sure that mod is enabled and start a new game then see if you modified the game files correctly.

If you want to revert the changes you made, you can just resubscribe to this mod or just follow these instructions but replace your changes with what I said I modified on the homepage.

Good luck and happy modding!

TLDR: I just forced aggressive equal 4 in faction.lua on every line where aggressive appears to equal a number.