If you are unfortunate enough to have friends and or family being controlled by narcissists or high conflict personalities you actually become an indirect victim yourself. They will not listen to a word you say, you HAVE to let them get to the point of taking no more, it will break your heart but there will be NOTHING you can do without making your own life as bad as theirs.

How the poison spreads. The narcissist breaks down his wife, narc mothers break down their kids, it can take years or decades, they will hide it from friends and family well. The children will often be harder for the narc to control, they can rebel, blazing rows over the years, some will fall out with the narc, cut them out of their lives as much as possible. Relatives of the victims will keep quiet for the sake of a quiet or easy life (not helping the victims at all). Ultimately the entire family suffers because of ONE single evil person in their lives, a weak person at that.

Even children of the narcs children will spot the narcissistic grandfathers evil ways, they are so perceptive, I've seen it happen myself, I could write a book about the damage narcs do to generations of families.

Therapy is the only way for the narcs and their victims.