“…In a seminal article, Haslam, Jetten, Postmes, and Haslam (2009) set out a research agenda that focuses on how social identity, the sense of self derived from perceived membership of social groups (Tajfel, 1972), is central to health. From this initial research agenda, work informed by the social identity approach to health (SIAH), has rapidly expanded to consider a range of health issues (e.g., brain injury Muldoon, Walsh, Curtain, Crawley, & Kinsella, 2019; Walsh, Muldoon, Fortune, & Gallagher, 2017; addiction Buckingham & Best, 2016, and care provision and community work Kellezi, Bowe, Wakefield, McNamara, & Bosworth, 2019; Stevenson, McNamara, & Muldoon, 2014). In our review, we highlight how a social identity‐informed focus transforms our understanding of trauma.…”