“…Similarly, in the social identity approach more broadly, contextually salient identities are proposed to shape behavior via meaningful, group‐specific norms (e.g., for environmental activism, Fielding et al., ). Membership in activist groups is thus plausibly linked to stronger in‐group identification (Drury & Reicher, ; Drury et al., ), responsiveness to in‐group norms (e.g., Amiot, Sansfaçon, & Louis, ), and greater relevant, domain‐specific activism (e.g., Blackwood et al., , ). In the same vein, the recent scholarship of opinion group membership (e.g., McGarty, Bliuc, Thomas, & Bongiorno, ) shows that activists’ mobilization is often on the basis of an identity defined by a single issue (e.g., opposition to battery farming), with no prima facie reason for generalized activism for other causes.…”