Protest is now almost entirely that negative phenomenon which characteristically occurs as a reaction to the alleged invasion of someone’s rights in the name of someone else’s utility. The self-assertive shrillness of protest arises because the facts of incommensurability ensure that protestors can never win an argument; the indignant self-righteousness of protest arises because the facts of incommensurability ensure equally that the protestors can never lose an argument either. Hence the utterance of protest is characteristically addressed to those who already share the protestors’ premises. The effects of incommensurability ensure that protestors rarely have anyone else to talk to but themselves. This is not to say that protest cannot be effective; it is to say that it cannot be rationally effective and that its dominant modes of expression give evidence of a certain perhaps unconscious awareness of this.
From After Virtue, by Alasdair MacIntyre