Activist identities in contentious events are the product of local interactions, and of evolving and mobile cycles of protest. In other words, they are both territorialized and deterritorialized. This paper proposes a way of understanding processes of collective identity within contentious events. It builds on existing conceptions of collective identity, (della Porta, Diani, Flesher Fominaya, Tilly), but uses Deleuze and Guattari's conception of assemblage to show how at any one time and place, identities are multiple and in motion. Social relations shape the ‘being’ of relationships amongst identities within a movement event, and make possible future ‘becomings.’ Such complexity is made visible by combining ethnographic data of the 2010 G20 summit protests in Toronto, with logistic regression of a survey of 379 activists participating in those protests. The results show the multiple, and entangled identities activists use in what might simply be described as a ‘global-justice movement’ event. By better understanding the assembled relations among movement identities, one can better understand the complex ways that movement events can unfold and be understood.

争议事件中的激进主义者身份是当地互动以及抗议活动不断发展和流动的产物。换句话说，它们既是地域化的，也是地域化的。本文提出了一种在争议事件中理解集体身份过程的方法。它建立在现有的集体身份概念（della Porta，Diani，Flesher Fominaya，Tilly）的基础上，但使用Deleuze和Guattari的集合概念来展示在任何时间和地点，身份是多重的并且在运动中。社会关系塑造运动事件中身份之间关系的“存在”，并使未来的“成为”成为可能。通过结合2010年G20多伦多峰会抗议的人种学数据，可以看到这种复杂性，通过逻辑回归对参与抗议活动的379位积极分子进行了调查。结果显示，活动家在可能被简单描述为“全球正义运动”事件中使用了多种纠缠的身份。通过更好地理解运动身份之间的组合关系，人们可以更好地理解运动事件可以展开和理解的复杂方式。