The idea of perfect harmony between siblings is a myth; conflict, jealousy, and comparison are an integral part of a child's development and constitute a fundamental learning experience for their future relationships.

noli's read

Research in developmental psychology largely supports this perspective. Longitudinal studies (notably those published in the 'Journal of Child Psychology and Psychiatry') confirm that sibling interactions, even when conflictual, serve as a social laboratory where the child learns negotiation, emotion regulation, and empathy. The idea that conflict is normal and formative is a consensus among family psychology researchers (type of evidence: observational studies and systematic reviews). The term 'fundamental learning experience' is supported by attachment theory and family systems theory, although the exact impact varies according to individual dynamics. It is not an exaggeration to say that these relationships shape future social skills, but it is important to note that the quality of parental guidance, emphasized by Dr. Feltin, is the key moderating factor. No evidence suggests that a total absence of conflict is a healthy or achievable goal.

the sources

No named source held this one up — that absence is part of the verdict.