“…Such grouplevel self-categorisations transform what otherwise would remain as aggregates of individuals (acting in idiosyncratic ways) into psychological groups (with individuals acting as group members). This is well illustrated in the behaviour of those who have never met before yet are able to cohere and act as a psychological group, e.g., hajjis in Mecca (Alnabulsi & Drury, 2014;Alnabulsi, Drury, & Templeton, 2018), music festival attendees (Davis, 2017;Drury, Novelli, & Stott, 2015), football fans (Neville & Reicher, 2011), and protestors (Drury & Reicher, 1999, 2000Reicher, 1984;Stott et al, 2018). What is more, shared experiences, such as those that occur in disasters, can create shared identity even amongst those who did not previously share a group membership (Drury, Cocking, & Reicher, 2009;Drury, Brown, Gonz alez, & Miranda, 2016).…”