Political parties in representative democracies have, as two of their most significant functions, to facilitate popular participation in the decision-making process and to implement, through control of governmental organs, those policies which are popularly favoured. Judged by these criteria, American parties are dysfunctional—so one critical school argues. American parties, they charge, are responsible neither to their members nor voters and are so organized and operated that they fail to govern effectively. When, in the early 1950s, this case against American parties had its greatest acceptance in the discipline, a number of critics contrasted American parties unfavourably with British parties. As an earlier generation of political scientists had urged Americans to adopt British institutions of government, so the critics of American parties favoured reforms which they thought were characteristic of British parties. If American parties became more like British parties, they argued, those parties would be more responsible and effective. Defenders of American parties refuted the critics' diagnosis and prescription by emphasizing the many environmental and institutional differences between Britain and the United States. British experience simply was not applicable in the U.S., they maintained. As study of British parties progressed an even more devastating rejoinder to critics of American parties emerged. Various findings began to suggest that although British parties obviously were much more cohesive in the legislature than were American parties, they were not nearly as responsible as the critics had assumed.