Conformity-enforcing packs of viscious children and adults gradually shape the social complexes we know as religion, science, corporations, ethnic groups, and even nations. The tools of our cohesion include ridicule, rejection, snobbery, self-righteousness, assault, torture, and death by stoning, lethal injection, or the noose. A collective brain may sound warm and fuzzily New Age, but one force lashing it together is abuse.