Why do new parties split? Scholars of new party schisms shy away from leadership-centred explanations for fear of excessive voluntarism and thus fail to conceptualise differences between leaders systematically. This article challenges that trend, arguing that externally appealing, internally dominant leaders generate cohesion in new parties. It analyses why some externally appealing leaders are internally dominant, while others are not, and argues that this variation can make the difference between schism and survival. The article supports its argument through a representative case study: the fatal (and consequential) schism of Peru's United Left coalition in the late 1980s.

中文翻译：

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新政党为何分裂：比较视角下秘鲁联合左翼的分裂

新政党为何分裂？由于担心过度的自愿主义，新政党分裂的学者回避以领导为中心的解释，因此未能系统地概念化领导人之间的差异。本文挑战这一趋势，认为具有外部吸引力、内部主导的领导者会在新政党中产生凝聚力。它分析了为什么一些具有外部吸引力的领导者在内部占主导地位，而另一些则不然，并认为这种差异可以在分裂和生存之间产生差异。这篇文章通过一个具有代表性的案例研究来支持它的论点：秘鲁联合左翼联盟在 1980 年代后期的致命（和后果性）分裂。