I frequently encounter the assumption that libertarians, being broadly opposed to government involvment in most everything, must support abortion “rights.” Just as frequently, I am appalled by it.
The “right” to terminate a fetus implies that the fetus is the property of the mother. Thus, the only feasible reason a mother should be stopped from having an abortion would be if the fetus is no longer her property and has become an individual entitled to individual rights and thus worthy of homesteading his or her own body.
The point in question, therefore, should not be “A woman has the right to do what she wants with her body,” for this is a straw man. The government has absolutely no control over the person or property of women or anyone else–all individuals own their own bodies. The term “reproductive rights” is absurd, there is no such thing (just as there are no “women’s rights,” or “minority rights,” or any other type of group-based distinction in regards to natural rights). There are only individual rights, and all of these apply to all individuals regardless of which groups they belong to. No true libertarian contests this point. Rather, the question should be, “Who (or what) qualifies as an individual,” or in other words, “At what point does a fetus become a human being and thence worthy of acquiring its own body as property?” For if we vest in government a monopoly on violence, then it is the government’s primary duty to protect property and prevent individuals from exercising violence against each other. It follows from this that the minarchist government is entirely justified in forbidding the practice of killing a fetus/toddler/child/teen/adult/senior or at whatever point humans become human.
A human being is entitled to human rights regardless of how much it weighs or how human it looks or where it is located (that is, inside or outside of its mother’s womb). But this is an utterly stupid thing to say, for it takes for granted that a fetus is indeed human, something entirely impossible to prove, because there are no objective criteria for the determination of humanity. So perhaps we should just legalize all abortion. But this is equally absurd, for if a human, blob of cells, or whatever the hell it is becomes a human at some point inside the womb, then a mother is committing parricide by killing her child. The government has a duty, a mandate to protect children from being murdered by parents (or anyone from being murdered by anyone, for that matter). But this is equally absurd, for we do not know with any degree of certainty that abortion of any sort is parricide, and one cannot prosecute on speculation. But speculation is all we have, and by legalizing abortion we risk legalizing parricide, and thus preventing fetuses from living out the rest of their lives.
So, when is the point at which a human becomes a human and is thus endowed with natural rights? Is it when 23 male chromosomes combine with 23 female chromosomes at fertilization? Is it when the fetus begins to take the form of a human? Is it at the first heartbeat, first brainwaves first breath, first meal, first steps, first words, first slice of bread consumed, first job acquired, first STD acquired, first signs of balding, first signs of dementia, first (insert arbitrary criterion)? The problem is that we have no objective means by which to determine at which point a person acquires individual rights and thence becomes entitled to the protection of his body from external harm by others–that is, from a violation of his property rights. We cannot have no standards whatsoever whereby we may reach a conclusion. If society is to function with any degree of sanity, we have to have some standard of who is a person and who is not.
Taking all this into consideration, it is perfectly understandable that reasonable, intelligent people disagree and will continue to disagree on the issue of abortion. I have to admit that this understanding has led me to sympathize with both sides. In spite of this, I respect neither, for neither recognizes the points I am making here as valid. Both continue to spout vain and presumptuous arguments in order to avoid a nihilistic hopelessness surrounding this issue (humans seem to despise uncertainty). It is my current state of mind that the agnostic approach is the most rational–that is, an approach of Socratic ignorance that takes claims from all fronts with equal skepticism and challenges them all with equal vigor. I simply do not see how any universal ethical principle (NAP) can apply to abortion, an issue with profound metaphysical questions that are impossible to answer with certainty by their very nature.