From 1400 to 1700, group litigation gradually switched from being the norm in England to the exception. The development of the concept of the corporation led to the wealthy supporters of the corporate form becoming suspicious of all unincorporated legal entities, which in turn led to the modern concept of the unincorporated or voluntary association. The tumultuous history of the Wars of the Roses and then the Star Chamber resulted in periods during which the common law courts were frequently paralyzed, and out of the confusion the Court of Chancery emerged with exclusive jurisdiction over group litigation.