From their origins until the present date, class actions have rested on the assumption that those within the class shared a commonality of interest. When the class is sufficiently cohesive, the named representative may appropriately litigate the interests of the entire class. American law generally holds that when a properly structured class action is resolved by a judicial judgment, the entire class is bound. This feature has made the class action a useful, if controversial, device for compacting within one suit dozens or even hundreds of individual actions. There are, however, trade-offs. For example, most individuals within the class ( unnamed or absent members) have little or no control over the manner in which the class action is co...