Problem: One of the Key points of the Social Domain Approach to Moral Psychology is during early childhood, moral concepts focus primarily on concrete physical harm and concerns with welfare; concepts of fairness develop from an understanding of equality and equal treatment during middle childhood to notions of equity in early adolescence.
Please explain and include another reference to back it up.
Reference
Killen, M., & Smetana, J. G. (2014). Handbook of moral development (2nd ed.). New York: Psychology Press.