Metaphysical Nihilism:
Metaphysical nihilism is the philosophical theory that concrete objects and physical constructs might not exist in the possible world, or that even if there exist possible worlds that contain some concrete objects, there is at least one that contains only abstract objects.
An extreme form of metaphysical nihilism is commonly defined as the belief that nothing exists as a correspondent component of the self-efficient world.[7] The American Heritage Medical Dictionary defines one form of nihilism as “an extreme form of skepticism that denies all existence.”[8] A similar skepticism can be found in solipsism; however, the nihilist would deny the self whereas the solipsist affirms nothing but.[9] Both these positions are considered forms of anti-realism.[10]
Epistemological Nihilism:
Epistemological nihilism is a form of skepticism in which all knowledge is accepted as possibly untrue or unable to be known.
Mereological Nihilism:
Mereological nihilism (also called compositional nihilism) is the position that objects with proper parts do not exist (not only objects in space, but also objects existing in time do not have any temporal parts), and only basic building blocks without parts exist, and thus the world we see and experience full of objects with parts is a product of human misperception (i.e., if we could see clearly, we would not perceive compositive objects).
This interpretation of existence must be based on resolution. The resolution with which humans see and perceive the “improper parts” of the world is not an objective fact of reality, but is rather an implicit trait that can only be qualitatively explored and expressed. Therefore, there is no arguable way to surmise or measure the validity of mereological nihilism. Example: An ant can get lost on a large cylindrical object because the circumference of the object is so large with respect to the ant that the ant effectively feels as though the object has no curvature. Thus, the resolution with which the ant views the world it exists “within” is a very important determining factor in how the ant experiences this “within the world” feeling.
Existential Nihilism:
Existential nihilism is the belief that life has no intrinsic meaning or value. With respect to the universe, existential nihilism posits that a single human or even the entire human species is insignificant, without purpose and unlikely to change in the totality of existence. The meaninglessness of life is largely explored in the philosophical school of existentialism.
Moral Nihilism:
Moral nihilism, also known as ethical nihilism, is the meta-ethical view that morality does not exist as something inherent to objective reality; therefore no action is necessarily preferable to any other. For example, a moral nihilist would say that killing someone, for whatever reason, is not inherently right or wrong.
Other nihilists may argue not that there is no morality at all, but that if it does exist, it is a human construction and thus artificial, wherein any and all meaning is relative for different possible outcomes. As an example, if someone kills someone else, such a nihilist might argue that killing is not inherently a bad thing, or bad independently from our moral beliefs, because of the way morality is constructed as some rudimentary dichotomy. What is said to be a bad thing is given a higher negative weighting than what is called good: as a result, killing the individual was bad because it did not let the individual live, which was arbitrarily given a positive weighting. In this way a moral nihilist believes that all moral claims are void of any truth value. An alternative scholarly perspective is that moral nihilism is a morality in itself. Cooper writes, “In the widest sense of the word ‘morality’, moral nihilism is a morality.”[11]
Political Nihilism:
Political nihilism, a branch of nihilism, follows the characteristic nihilist’s rejection of non-rationalized or non-proven assertions; in this case the necessity of the most fundamental social and political structures, such as government, family, and law. An influential analysis of political nihilism is presented by Leo Strauss.[12]
