For the General Elections in 2000, nearly one thousand civic groups in South Korea joined forces to stage so-called “defeat campaign” against allegedly corrupt, incompetent or “ill-mannered” politicians. While sociologists and political scientists are still engaged in debates as to the success of the campaign, there is no denying that it played a significant role in thwarting many politicians from getting nominated or elected. It is also true that the defeat campaign has heralded a new era of Korean politics in which civic groups have emerged as a major political force, capable of challenging government or party policies and pending bills as well as influencing agenda setting in a diverse array of policy areas. The paper shows that the enthusiastic public support, effective strategies of the campaign and attentive mass media, among others, contributed to the campaign's “success.” The paper also shows that a complex political calculation was involved in the parties' differing reaction to the alliance's effort, which increasingly constrained the latter's manoeuvrability. It is also argued that greater political involvement by civic groups is likely to lead to more pluralistic, open and competitive form of democracy in which voters become more aware of political issues and participate more actively in political processes.