20世纪八九十年代是台湾民主化转型的关键时期，在这期间，台湾的政党制度也逐渐从国民党一党垄断权力的霸权党制转变为各个政党分享权力的两党制。究其原因，既有中美关系改善给国民党带来的外部挑战，也有党外运动和省籍矛盾给国民党带来的内部冲击；既有政治腐败和选举体制僵化给国民党带来的自身困境，也有儒家文化与自由主义观念冲突给国民党带来的两难处境；既有李登辉不当的改革措施给国民党带来的分裂和伤痛，也有党外势力的团结合作给国民党带来的打击和毁灭。%The critical period of Taiwan's democratic transition is in 1980s and 1990s. During this period, the political party system of Taiwan gradually changed from Hegemonic party system-the power monopolized by Nationalist party to Two-party system, the power of which is shared by all parties. There are many reasons account to this change. One is the external challenge brought by the improvement of the Sino-US relations, another is the internal shocks caused by the movement of outside the party and the ethnic conflict. One is the inner plight produced by political corruption and the rigid electoral system, another is the dilemma engendered by the conflict between confucian culture and the liberalism. One is the damage generated by the incorrect reform measures implemented by Lee Teng-hui;another is the strike created by the cooperation of the outside forces.
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