LR - Good thread.
I would have to agree in basic principle that you are correct. Of course, once the micro-level society is harmed, that may at times translate to the macro-level. HIdden child abuse will eventually effect society in whole. Lower education levels will affect society as a whole, perhaps even robbing society of a genius and his/her contributions. Etc. But of course any micro society will have it's minor effects within the macro. After all, all macro society is made of a quilt of micro societies isn't it?
Cults in general do not contribute to a healthy society in the end macro. But then niether do lazy people, drug addicts, welfare frauds, thieves, drunks, poorly skilled craftsmen, liars, prostitutes, etc. The fabric of macro-society is made up of many groups that do little to make the world a better place, and many groups that tend to make it a better place.
In the end - a few hundred thousand witnesses, or mormons, or amish - all of whom integrate into society less than some others - will not change the overall society to a great degree will it? They will always be here to one extent or another, and always have been.
Mostly they are harmless - but at times they cause significant harm that will damage society. I just think the statement is too broad in some ways.
Many here cannot see the picture clearly in this issue [as I cannot at times] due to great personal damage done at the micro level. Hard to see for some the forests effects, when being nose to nose with the tree in front of you.
Jeff