How bad can a good enough parent be?

Almost everyone accepts that parents must provide a good enough upbringing in order to retain custodial rights over children, but little has been said about how that level should be set. In this paper, I examine ways of specifying a good enough upbringing. I argue that the two dominant ways of setting this level, the Best Interests and Abuse and Neglect Views, are mistaken. I defend the Dual Comparative View, which holds that an upbringing is good enough when shortfalls from the best alternative upbringing in terms of the child's interests are no more significant than the parents' interest.