I think it's everybody's responsibility to be a peace keeper no matter what. If you see somebody attacking somebody else, it's up to you to do something about it.
In one sense, I think having an "official" body for this makes this duty a 'commodity' and eases their mind as they shirk their responsibility to their fellow man, country and god.
Just joking, when the going gets tough I get the fuck out of dodge. There's always one more cave to hide in.