I think the author was implicitly referring to loosely organized groups instead of dictatorships. In groups with strong leaderships, instead of being like a "g

I think the author was implicitly referring to loosely organized groups instead of dictatorships. In groups with strong leaderships, instead of being like a "group", they are more like a bunch of organized people following a (small number of) leader(s), in which case the risk of schism is less pronounced.