<p>Adolescents who tend to bother others are commonly rejected by their classmates, perpetuating their aggressive behaviors to search for social recognition and status. By contrast, concern for others’ well-being, caring, and helping are related to inclusion and positive peer relations. The present study hypothesized that common humanity promotes care and concern for others, favoring inclusion and reciprocal relations. Through an experimental randomized control trial design with 200 early adolescents from three different schools in Santiago, Chile, we tested whether, by manipulating common humanity, adolescents would broaden their circle of care, considering different specific others: a friend, a classmate who tends to bother others, and a barely known classmate, among others. Participants reported on their care and concern about these specific peers’ well-being, their intention to help them when in need, and their motives for helping (not helping, or doubting). Results confirmed that, overall, the well-being of peers who tend to bother others is less valued and that they are less likely to receive help when in need. Regarding the effects of common humanity, participants in the experimental group increased the value they give to the well-being of classmates who tend to bother others, also changing some arguments to help or not these peers when in need. Conceptual and practical implications of these findings are discussed, considering potential effects in reducing bullying by breaking the cycle of aggression, rejection, and negative interpersonal relationships, and more broadly by informing educational strategies aimed at systemic change toward nurturing peer dynamics.</p>