Ethical naturalism (also called moral naturalism or naturalistic cognitivistic definism) is the
meta-ethical view that holds that moral properties and facts are reducible to natural properties and can be studied through empirical or scientific means. It asserts that moral values are objective features of the natural world and can be understood through reason, observation, or the natural sciences. Ethical naturalists argue that moral statements, such as "kindness is good" or "stealing is wrong," are fact-based and can be verified in the same way as other statements about the world. This position stands in contrast to ethical non-naturalism, which maintains that moral properties are not reducible to natural properties, and to moral anti-realism, which denies that objective moral truths exist. Ethical naturalism has been supported by various philosophical traditions, including utilitarianism, virtue ethics, and evolutionary ethics, but has also been challenged by critics, most notably through G.E. Moore’s "open-question argument," which questions whether moral properties can be fully explained in natural terms.
Overview
The versions of ethical naturalism which have received the most sustained philosophical interest, for example,
Cornell realism, differ from the position that "the way things are is always the way they ought to be", which few ethical naturalists hold. Ethical naturalism does, however, reject the
fact-value distinction: it suggests that inquiry into the natural world can increase our moral knowledge in just the same way it increases our scientific knowledge. Indeed, proponents of ethical naturalism have argued that humanity needs to invest in the
science of morality, a broad and loosely defined field that uses evidence from biology, primatology, anthropology, psychology, neuroscience, and other areas to classify and describe moral behavior.
Ethical naturalism encompasses any reduction of ethical properties, such as 'goodness', to non-ethical properties; there are many different examples of such reductions, and thus many different varieties of ethical naturalism.
Hedonism
Hedonism is a family of Philosophy, philosophical views that prioritize pleasure. Psychological hedonism is the theory that all human behavior is Motivation, motivated by the desire to maximize pleasure and minimize pain. As a form of Psycholo ...
, for example, is the view that goodness is ultimately just
pleasure
Pleasure is experience that feels good, that involves the enjoyment of something. It contrasts with pain or suffering, which are forms of feeling bad. It is closely related to value, desire and action: humans and other conscious animals find ...
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Ethical theories that can be naturalistic
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Altruism
Altruism is the concern for the well-being of others, independently of personal benefit or reciprocity.
The word ''altruism'' was popularised (and possibly coined) by the French philosopher Auguste Comte in French, as , for an antonym of egoi ...
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Consequentialism
In moral philosophy, consequentialism is a class of normative, teleological ethical theories that holds that the consequences of one's conduct are the ultimate basis for judgement about the rightness or wrongness of that conduct. Thus, from a ...
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Consequentialist libertarianism
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Cornell realism
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Ethical egoism
In ethical philosophy, ethical egoism is the normative position that moral agents ''ought'' to act in their own self-interest. It differs from psychological egoism, which claims that people ''can only'' act in their self-interest. Ethical ego ...
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Objectivism
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Evolutionary ethics
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Hedonism
Hedonism is a family of Philosophy, philosophical views that prioritize pleasure. Psychological hedonism is the theory that all human behavior is Motivation, motivated by the desire to maximize pleasure and minimize pain. As a form of Psycholo ...
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Humanistic ethics
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Natural law
Natural law (, ) is a Philosophy, philosophical and legal theory that posits the existence of a set of inherent laws derived from nature and universal moral principles, which are discoverable through reason. In ethics, natural law theory asserts ...
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Natural-rights libertarianism
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Utilitarianism
In ethical philosophy, utilitarianism is a family of normative ethical theories that prescribe actions that maximize happiness and well-being for the affected individuals. In other words, utilitarian ideas encourage actions that lead to the ...
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Virtue ethics
Virtue ethics (also aretaic ethics, from Greek []) is a philosophical approach that treats virtue and moral character, character as the primary subjects of ethics, in contrast to other ethical systems that put consequences of voluntary acts, pri ...
Criticisms
Ethical naturalism has been criticized most prominently by
ethical non-naturalist G. E. Moore
George Edward Moore (4 November 1873 – 24 October 1958) was an English philosopher, who with Bertrand Russell, Ludwig Wittgenstein and earlier Gottlob Frege was among the initiators of analytic philosophy. He and Russell began de-emphasizing ...
, who formulated the
open-question argument. Garner and Rosen say that a common definition of "natural property" is one "which can be discovered by sense observation or experience, experiment, or through any of the available means of science." They also say that a good definition of "natural property" is problematic but that "it is only in criticism of naturalism, or in an attempt to distinguish between naturalistic and nonnaturalistic definist theories, that such a concept is needed."
R. M. Hare also criticised ethical naturalism because of what he considered its fallacious definition of the terms 'good' or 'right', saying that value-terms being part of our prescriptive moral language are not reducible to descriptive terms: "Value-terms have a special function in language, that of commending; and so they plainly cannot be defined in terms of other words which themselves do not perform this function".
Moral nihilism
Moral nihilists maintain that there are no such entities as objective values or objective moral facts. Proponents of
moral science like Ronald A. Lindsay have counter-argued that their way of understanding "morality" as a practical enterprise is the way we ought to have understood it in the first place. He holds the position that the alternative seems to be the elaborate philosophical reduction of the word "moral" into a vacuous, useless term.
[Center Stage , Episode 24 – Bioethics and Public Policy, Part 1]
Center for Inquiry (2010-04-12). Retrieved on 2011-04-30. Lindsay adds that it is important to reclaim the specific word "morality" because of the connotations it holds with many individuals.
Morality as a science
Author
Sam Harris
Samuel Benjamin Harris (born April 9, 1967) is an American philosopher, neuroscientist, author, and podcast host. His work touches on a range of topics, including rationality, religion, ethics, free will, determinism, neuroscience, meditation ...
has argued that we overestimate the relevance of many arguments against the science of morality, arguments he believes scientists happily and rightly disregard in other domains of science like physics. For example, scientists may find themselves attempting to argue against philosophical
skeptics, when Harris says they should be practically asking – as they would in any other domain – "why would we listen to a
solipsist in the first place?" This, Harris contends, is part of what it means to practice a science of morality.

In modern times, many thinkers discussing the
fact–value distinction
The fact–value distinction is a fundamental epistemological distinction described between:
# Statements of fact (positive or descriptive statements), which are based upon reason and observation, and examined via the empirical method.
# Statem ...
and the
is–ought problem have settled on the idea that one cannot derive ''ought'' from ''is''. Conversely, Harris maintains that the fact-value distinction is a confusion, proposing that values are really a certain kind of fact. Specifically, Harris suggests that values amount to empirical statements about "the flourishing of conscious creatures in a society". He argues that there are objective answers to moral questions, even if some are difficult or impossible to possess in practice. In this way, he says, science can tell us what to value. Harris adds that we do not demand absolute certainty from predictions in physics, so we should not demand that of a science studying morality (see ''
The Moral Landscape'').
Physicist
Sean Carroll believes that conceiving of morality as a science could be a case of
scientific imperialism and insists that what is "good for conscious creatures" is not an adequate working definition of "moral".
[Sam Harris Responds , Cosmic Variance , Discover Magazine](_blank)
. Blogs.discovermagazine.com. Retrieved on 2011-04-30. In opposition, John Shook, vice president of the
Center for Inquiry, claims that this working definition is more than adequate for science at present and that disagreement should not immobilize the scientific study of ethics.
Sam Harris vs. The Philosophers on Morality
Center for Inquiry (2010-05-14). Retrieved on 2011-04-30.
References
Other sources
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External links
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{{DEFAULTSORT:Ethical Naturalism
Metaethics
Naturalism (philosophy)
Ethical theories