“…Drawing on social cognitive theory, which posits that behaviors and cognitions are, in part, the result of socialization processes within different socio-cultural contexts ( Bandura, 1999 ), and empirical evidence from cross-sectional studies that collective moral disengagement at the classroom level is negatively associated with defending behavior ( Gini et al, 2015 ; Kollerová et al, 2018 ), and positively linked with peer aggression ( Gini et al, 2015 ), bullying perpetration ( Kollerová et al, 2018 ; Bjärehed et al, 2021 ; Thornberg et al, 2021 ), siding with peer aggressors ( Sjögren et al, 2021a ), and individual moral disengagement ( Luo and Bussey, 2023 ), we hypothesized that greater collective moral disengagement at the classroom level would predict greater individual moral disengagement 1 year later ( Hypothesis 1 ).…”