In 1998, independent scholar Judith Rich Harris published "The Nurture Assumption", in which she argued that scientific evidence, especially behavioral genetics, showed that all different forms of parenting do not have significant effects on children's development, short of cases of severe child abuse or child neglect. She proposes two main points for the effects: genetic effects, and social effects involved by the peer groups in which children participate. The purported effects of different forms of parenting are all illusions caused by heredity, the culture at large, and children's own influence on how their parents treat them.