Why do preschoolers perpetuate inequalities? Theoretical perspectives on inequity preferences in the face of emerging concerns for equality

Recent research has shown that preschool children tend to preferentially allocate resources to rich than to poor others. The findings that young children tend to perpetuate inequalities are puzzling given classical developmental theories that largely focused on the emergence of equality and equity in childhood. In this review, we first sketch the early ontogeny of fairness concerns before providing an overview on studies reporting perpetuation of inequality in young children. We review four classical theories (Piaget, Kohlberg, Damon, Social Domain Theory) and discuss how they would account for this phenomenon. We then introduce four recent theoretical models that directly speak to the underlying psychological processes; the affective preference model, the reciprocity-based strategic model, the numerical matching model, and the normative model. We highlight the key tenets of each model, their relation to other developmental processes, and the strength of the empirical evidence. From each model, we derive specific hypotheses. Finally, in an integrative section we discuss how the models might relate to each other, highlight connections to other research areas, and present avenues for future research.