How, then, would society make dynamic collective decisions about public affairs, aside from mere individual contracts? The only collective alternative to majority voting as a means of decision-making that is commonly presented is the practice of consensus. Indeed, consensus has even been mystified by avowed "anarcho-primitivists," who consider Ice Age and contemporary "primitive" or "primal" peoples to constitute the apogee of human social and psychic attainment. I do not deny that consensus may be an appropriate form of decision-making in small groups of people who are thoroughly familiar with one another. But to examine consensus in practical terms, my own experience has shown me that when larger groups try to make decisions by consensus, it usually obliges them to arrive at the lowest common intellectual denominator in their decision-making: the least controversial or even the most mediocre decision that a sizable assembly of people can attain is adopted -- precisely because everyone must agree with it or else withdraw from voting on that issue. More disturbingly, I have found that it permits an insidious authoritarianism and gross manipulations -- even when used in the name of autonomy or freedom.
To take a very striking case in point: the largest consensus-based movement (involving thousands of participants) in recent memory in the United States was the Clamshell Alliance, which was formed to oppose the Seabrook nuclear reactor in the mid-1970s in New Hampshire. In her recent study of the movement, Barbara Epstein has called the Clamshell the "first effort in American history to base a mass movement on nonviolent direct action" other than the 1960s civil rights movement. As a result of its apparent organizational success, many other regional alliances against nuclear reactors were formed throughout the United States.
I can personally attest to the fact that within the Clamshell Alliance, consensus was fostered by often cynical Quakers and by members of a dubiously "anarchic" commune that was located in Montague, Massachusetts. This small, tightly knit faction, unified by its own hidden agendas, was able to manipulate many Clamshell members into subordinating their goodwill and idealistic commitments to those opportunistic agendas. The de facto leaders of the Clamshell overrode the rights and ideals of the innumerable individuals who entered it and undermined their morale and will.
In order for that clique to create full consensus on a decision, minority dissenters were often subtly urged or psychologically coerced to decline to vote on a troubling issue, inasmuch as their dissent would essentially amount to a one-person veto. This practice, called "standing aside" in American consensus processes, all too often involved intimidation of the dissenters, to the point that they completely withdrew from the decision-making process, rather than make an honorable and continuing expression of their dissent by voting, even as a minority, in accordance with their views. Having withdrawn, they ceased to be political beings -- so that a "decision" could be made. More than one "decision" in the Clamshell Alliance was made by pressuring dissenters into silence and, through a chain of such intimidations, "consensus" was ultimately achieved only after dissenting members nullified themselves as participants in the process.
On a more theoretical level, consensus silenced that most vital aspect of all dialogue, dissensus. The ongoing dissent, the passionate dialogue that still persists even after a minority accedes temporarily to a majority decision, was replaced in the Clamshell by dull monologues -- and the uncontroverted and deadening tone of consensus. In majority decision-making, the defeated minority can resolve to overturn a decision on which they have been defeated -- they are free to openly and persistently articulate reasoned and potentially persuasive disagreements. Consensus, for its part, honors no minorities, but mutes them in favor of the metaphysical "one" of the "consensus" group.
The creative role of dissent, valuable as an ongoing democratic phenomenon, tends to fade away in the gray uniformity required by consensus. Any libertarian body of ideas that seeks to dissolve hierarchy, classes, domination and exploitation by allowing even Marshall's "minority of one" to block decision-making by the majority of a community, indeed, of regional and nationwide confederations, would essentially mutate into a Rousseauean "general will" with a nightmare world of intellectual and psychic conformity. In more gripping times, it could easily "force people to be free," as Rousseau put it -- and as the Jacobins practiced it in 1793-94.
The de facto leaders of the Clamshell were able to get away with their behavior precisely because the Clamshell was not sufficiently organized and democratically structured, such that it could countervail the manipulation of a well-organized few. The de facto leaders were subject to few structures of accountability for their actions. The ease with which they cannily used consensus decision-making for their own ends has been only partly told,6 but consensus practices finally shipwrecked this large and exciting organization with its Rousseauean "republic of virtue." It was also ruined, I may add, by an organizational laxity that permitted mere passersby to participate in decision-making, thereby destructuring the organization to the point of invertebracy. - Murray Bookchin, 'What is Communalism?: The Democratic Dimension of Anarchism'.