If you put an individual in a state of peril, you have a positive obligation to get them to safety. Not only must you take whatever reasonable actions are necessary to save them, you may also undertake these actions without their consent, if your actions are justifiable in fulfilment of your obligation. For example, if you push someone into a lake who cannot swim, you must get them out before they drown or you will have committed homicide. If you need to pull them back onto land, you must do this even if they are so panicked that they flail around and attempt fight you off while you do so.
This basic principle provides a clear logical grounding for both parental obligation and parental authority. If you accept that parents have a causal responsibility for the peril that children face as a result of creating them, then it is easy to understand why parents are justified in having authority over their children to undertake whatever steps are necessary to get them out of peril. In the case of children, peril ends when the child becomes a self-sufficient adult. So parents are obliged to undertake whatever care is necessary for a child to grow into a self-sufficient adult. This causal theory not only explains what parental obligations are, but also specifies which individuals are obligated to care for each specific child.
However, most libertarian theorists do not view parenting in this way because they have denied the existence of all positive obligations except those agreed to voluntarily (i.e. by contract). When it comes to parenting, this has resulted in libertarians either denying that children have any enforceable claim against their parents for care (as Rothbard and Evers did) or arguing that children only have a claim if parents voluntarily commit to assuming obligations for their children (as Steve Horwitz and Roderick Long did).
This has left libertarians with a big problem when it comes to explaining why parents have authority over their children. In the absence of a theory of obligation explaining why specific parents must care for specific children, what gives any particular person the right to claim parental authority over a child? Also, without a theory of obligation, why should any particular person have the right to act paternalistically towards that specific child?
Libertarians have attempted to solve this problem by applying the concept of homesteading to parenting. Their line of argument is as follows:
- There are no positive obligations, so people only have the role of parent if they voluntarily choose to assume it. All parents are volunteers.
- For any given child, there could be competing claims to act as the parent of the child, since multiple people could volunteer for the role. This could lead to conflict.
- Libertarianism solves the potential for conflict arising from rivalrous claims by assigning a property right using the principle of homesteading. The rule used is that the property right justly belongs to the first person to perform whatever acts are necessary to make a claim.
- Therefore, the solution to who gets to parent a child is to consider parenting as a property right and identify the acts necessary to claim it.
Opinions differ among libertarians on various details, such as what act constitutes homesteading a baby. But all proponents agree on the basic proposition that parenting a child is a rivalrous good and homesteading is the rule used to allocate it.
Those who argue that parental authority is a homesteaded property right imply that parental obligation comes attached to the homesteading of that property right. This is because– according to this theory– everything to do with being a parent is a homesteaded property right. The idea is that one homesteads a bundle of rights associated with the role of parenthood, such as the right to exclude others from parenting the child and the right to exert paternalistic authority over the child.
However, if you accept that parents have causal obligations, then the concept of homesteading parental authority as a property right is nonsensical because parental authority derives from parental obligation. Parental obligation is antecedent to parental authority. Parental obligation provides both the justification of parental authority and the criteria to set limits on it. Therefore parental authority can only be secondary to and derived from obligation. It is only because libertarians do not understand this that they invented the idea of parenting as a homesteaded property right.
The entire theory of homesteading parental authority has been adopted by libertarians because they do not have a causal theory of parental obligation. If they had such a theory, it would be self-evident that the idea of homesteading a child is absurd.