I haven't seen much being asked about children here, but I know this is a very common topic in general. I wanted to know, when children fight, especially siblings (which they're bound to do), what should a parent do, ideally? Because you have the parents that get involved, yell at one of the children, help the other, depending on whose fault it is. This can teach the child right from wrong. You also have the set of parents that choose not to get involved in the fights, and this does make sense to me too.
So according to psychology, what's the best way to deal with this?