An ethnographic study of two crowd events was carried out in order to develop a hypothesis about the experience of empowerment in collective action. Qualitative comparison of an anti-roads occupation and a mass eviction suggests that empowerment as an outcome of collective action is a function of the extent to which one's own action is understood as expressing social identity, a process we term collective self-objectification. The comparison indicates that empowerment is not reducible to the experience of success. While both events came to be construed by participants as 'victories', their associated emotions (joy versus despair and anger) and rationales for future participation (confidence versus enhanced self-legitimacy) were different. The relation between collective self-objectification and self-efficacy is discussed. Copyright # 2005 John Wiley & Sons, Ltd.'Empowerment' might be defined as a social-psychological state of confidence in one's ability to challenge existing relations of domination. A number of political, anecdotal, historical, autobiographical and journalistic as well as social-scientific accounts have shown that collective action may engender experiences of empowerment, both for the individual participant and for the collective as a whole, typically accompanied by positive affect (e.g. Barker, 1999; Benford & Hunt, 1995, p. 90; Gallacher, 1936, pp. 43, 199; Gregoire & Perlman, 1969, p. 37; Harford & Hopkins, 1984, pp. 92-93; Kelly & Breinlinger, 1996, p. 122; McAdam, 1982, pp. 48-51; Pelton, 1974, p. 134; Piven & Cloward, 1977, pp. 3-4).If the feeling of empowerment endures beyond the collective action itself, it could affect participants' personal lives and motivate involvement in further collective action. The obvious significance of this is in terms of social change. To the extent that people feel increasingly able to participate in collective actions such as protests, demonstrations and other social movement events, then society may change as a result.