“…Both emotion regulation and identity regulation can be extrinsic (performed by others, usually fellow group members) or intrinsic (performed by the individual him or herself ). Given the functionality of positive and shared groupbased emotions, it is no surprise that groups-especially intentionally formed groups (like clubs, religious affiliations, and professional associations) as well as natural groups (such as gender, ethnicities, and age cohorts)-engage in specific practices and behaviors that enhance positivity and sharing of emotion, as an additional social "glue" that increases identification and readiness for collective action (Beyer, von Scheve, & Ismer, 2014;de Rivera, 2014;Lawler, 2003). As noted earlier, emotions are under strong normative control, and the transmission of injunctive norms (what people ideally should or ought to do; what is approved, expected, and correct) is essential for group cohesiveness and commitment (Thomas, McGarty, & Mavor, 2009).…”