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Vincent Cook's avatar

The difficulty with Rothbard's particular take on ethical naturalism (a problem also shared by Ayn Rand's Objectivist ethics) is that he tries to overcome the is-ought dichotomy by claiming that all moral choice presupposes a choice to live to be able to accomplish anything, and therefore a choice of life over death constitutes an axiomatic basis for ethics. He makes this argument more explicit in his book _The Ethics of Liberty_.

The problems here are that (1) the formation of a utility scale precedes the action, meaning that choice might be inconsistent with the possibility of making further choices in the future; and (2) there is in fact no binary choice between life and death, our choices are constrained by actions that might bring about death sooner or later. Instead of having to maximize lifespan, it is logically coherent for a moral agent to choose some other final end to optimize and treat the length of one's future lifespan as an instrumental value to be chosen in accord with that final end.

The poor reputation of ethical naturalism among modern secular philosophers is due to it being derived from ancient Greek philosophers (most notably Aristotle, but Plato and the Stoics as well) who sought to venerate the exercise of man's rational faculties as somehow being metaphysically essential, with essentialism reflecting what amounts to a doctrine of divine intelligent design. Rand was explicit in linking her notion of "life" to a _qua man_ qualifier; but both Rand and Rothbard modeled their ethical naturalism on Aristotle's system while failing to embrace Aristotle's metaphysical theory that final ends are defined by a hierarchy of external causal agents and ultimately by a divine "prime mover."

Ethical intuitionism doesn't really fix this error with respect to the is-ought problem; treating the abstraction of "good" as an introspective object neither explains one's motivation for choosing it nor its universality among human beings. If you are trying to urge someone to be good, how can you know that they will intuit goodness in the same way you do, or care about it is much as you do?

There was an ancient Greek philosopher, Epicurus, who proposed a different solution to the is-ought problem in the context of a metaphysical system that is thoroughly materialist and devoid of divine providence and of an empiricist epistemology. Epicurus proposed that while one can attempt to act on the basis of arbitrarily chosen values, such attempts aren't always successful if they conflict with one's innate desires, which in turn are causally linked to the operation of one's innate pleasure/pain mechanisms.

A modern psychologist would characterize this as a type of cognitive dissonance. It isn't simply mutually inconsistent values that can produce such dissonance (which, as ethical skeptics like Hume recognized, obliges a rational ethics to harmonize all instrumental values to optimizing a single final end); an arbitrarily-chosen final end can also produce dissonance if it generates sufficient pain, turmoil, and misery to prevent one from acting. A rational ethics must also take into account facts regarding man's innate desire for happiness and the innate psychological properties of man, including one's innate pleasure/pain mechanisms, that are involved in generating happiness to align the choice of final end to what can be consistently realized in light of man's psychological nature.

Epicurus further argued that happiness is caused by the memories of past pleasures and anticipations of future pleasures as well as the present experience of pleasure, so optimizing the pursuit of happiness requires active management of the flow of pleasures one experiences over an entire lifespan and it requires attitudes that help one fully appreciate past, present, and future pleasures and to cope with pain when it occurs. This ethical naturalism appeals, not to one having a mysterious essence designed by God that sets a final end for you, but rather to one's introspective experiences of how reason, pleasure, and pain motivate one's own behavior and our sensory experiences of the words and deeds of other human being that enable us to infer that analogous mental states exist in the minds of others.

Epicurean ethics is also constrained by the particular facts of man's psychological nature one can form generalizations about. While one can infer from these generalizations a few universal principles of conduct (i.e. instrumental virtues) and attitudes that are necessary to everyone's pursuit of happiness, there are also differences among individuals that restrict the extent to which such broad generalizations can specify particular choices for particular individuals. Within the constraints of universal virtues, individuals still must find their own path through life, relying on their personal experiences to continually fine-tune the more detailed aspects of their moral beliefs to fit their own personal natures and circumstances.

Gian's avatar

There are problems with Locke's homesteading. What does it mean precisely to mix one's labor with a thing? As Nozick provided an example of mixing in a bottle of ketchup in ocean.

In general, Locke provides a general idea whose precise details need to be fixed. And only a political community can provide the required precision of how much labor needs to be mixed with precisely which things. Thus, political community is essential to define property rights. Also the example provided by Milton Friedman-- how much of airspace above your landholding belongs to you? Only the political community can define it.

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