Limitation - Can lead to human rights abuses (P+E+A):
P: too much reliance on deviation from social norms to understand abnormality can also lead to systematic abuse of human rights
E: historical examples of deviation from social norms (drapetomania - black slaves - running away + nymphomania - women - sexual attraction to working-class men) show that they were put into place to control minority ethnic groups + women
A: these appear ridiculous nowadays but this is only because our social norms have changed