This article analyses the assessments of Truth Commissions (TCs) and their association with positive socio-emotional climate and trust in institutions in six South American countries The sample consisted of 4,442 participants (53.3% women), 13 to 90-years-old (M = 37.4, SD = 15.7). Participants answered a questionnaire comprised of scales that evaluated their knowledge, evaluation, emotions and social sharing about the TC, as well as the socio-emotional climate and the trust in institutions. Comprehensive Meta-analysis procedure and multiple linear regression were carried out. Positive evaluation of the TCs was related to trust in institutions (r̅ = .23, random model) and a positive socio-emotional climate (r̅ = .31, random model). Political positioning and age showed limited effects. Finally, the associations of positive TC evaluation with social climate and trust in institutions were found to be positively moderated by contextual factors.