“…I draw on my program of research on the motivational role of uncertainty in social identity processes (uncertainty‐identity theory: e.g., Hogg, 2007, 2012, 2021a) and societal fragmentation and factionalism (e.g., Hogg, 2014, 2021b), and on how intergroup leadership may combat this process (intergroup leadership theory: e.g., Hogg, 2015; Hogg & Rast, 2022; Hogg et al., 2012a), to address two questions that speak directly to the conference theme: (a) what motivates people to embrace and sustain exclusionary ethnocentric identities, and (b) what can be done to inhibit this and facilitate societal connections and integration across deep identity divisions. Broadly framed by social identity theory (Tajfel & Turner, 1986; Turner et al., 1987; also see Abrams & Hogg, 2010; Hogg, 2018a; Hogg & Abrams, 1988) these motivational and social influence analyses describe the role of self and social identity uncertainty in building “walls”, and the palliative potential of identity messaging by “leadership” in tearing down those walls.…”