I’ll start : some years ago I visited a city where anarchists were trying to solve conflicts between residents (squat building) by calling on outside people. These people were political allies, but they were not friends with the social circle involved in arguments, they were from another city, and they had trained themselves to psychology and this kind of situations.

This was really impressive to me, that people were actually smart enough to try to solve their inner problems by calling on people who are not involved emotionaly and are competent in their field/skills.