|Part of a series on|
Related concepts and fundamentals:
The term is sometimes used in association with
Nihilism has also been described as conspicuous in or constitutive of certain historical periods: for example,
This article is written like a personal reflection or opinion essay that states a Wikipedia editor's personal feelings about a topic.(October 2012) (
Nihilism has many definitions, and thus can describe multiple arguably independent philosophical positions.
Metaphysical nihilism is the
Extreme metaphysical nihilism is commonly defined as the belief that nothing exists as a correspondent component of the self-efficient world.
 The American Heritage Medical Dictionary defines one form of nihilism as "an extreme form of skepticism that denies all existence."
 A similar skepticism concerning the concrete world can be found in
Epistemological nihilism is a form of
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 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
Moral nihilism, also known as ethical nihilism, is the
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." 
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
The Russian Nihilist movement was a Russian trend in the 1860s that rejected all authority.
 After the assassination of Tsar