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A need is something that is necessary for organisms to live a healthy life. Needs are distinguished from wants because a deficiency would cause a clear negative outcome, such as dysfunction or death. Needs can be objective and physical, such as food, or they can be subjective and psychological, such as the need for self-esteem. On a social level, needs are sometimes controversial. Understanding needs and wants is an issue in the fields of politics, social science, and philosophy.
To most psychologists, need is a psychological feature that arouses an organism to action toward a goal, giving purpose and direction to behavior.
The most widely known academic model of needs was proposed by psychologist Abraham Maslow. In his theory, he proposed that people have a hierarchy of psychological needs, which range from security to self-actualization. However, while this model is intuitively appealing, it has been difficult to operationalize it experimentally. It was further developed by Clayton Alderfer.
One of the problems with a psychological theory of needs is that conceptions of "need" may vary radically between different cultures or different parts of the same society. One person's view of need may easily be seen as paternalistic by another.
A second view of need is represented by the work of political economy professor Ian Gough. He has published on the subject of human needs in the context of social assistance provided by the welfare state. With medical ethics professor Len Doyal, he also published A Theory of Human Need.
Their view goes beyond the emphasis on psychology: it might be said that an individual's needs are representative of the costs of being human within society. A person who does not have his or her needs fulfilled—i.e., a "needy" person—will function poorly in society.
In the view of Gough and Doyal, each person has an objective interest in avoiding serious harm that prevents the endeavor to attain his or her vision of what's good, no matter what that is exactly. This attempt requires the ability to participate in the societal setting in which an individual lives. More specifically, each person needs to have both physical health and personal autonomy. The latter refers to the capacity to make informed choices about what should be done and how to implement that. This requires mental health, cognitive skills, and chances to participate in society's activities and collective decision-making.
How are such needs satisfied? Doyal and Gough point to eleven broad categories of "intermediate needs" that define how the need for physical health and personal autonomy are fulfilled:
How are the details of needs satisfaction determined? The authors point to rational identification of needs using the most up-to-date scientific knowledge; the use of the actual experience of individuals in their everyday lives; and democratic decision-making. The satisfaction of human needs cannot be imposed "from above".
This theory should be compared to the capability approach developed by Amartya Sen and Martha Nussbaum. Those with more internal "assets" or "capacities" (e.g., education, sanity, physical strength, etc.) have more capabilities (i.e., more available choices, more positive freedom). They are thus more able to escape or avoid poverty. Those with more capabilities fulfill more of their needs.
In his 1844 Paris Manuscripts, Karl Marx famously defined humans as "creatures of need" or "needy creatures" who experienced suffering in the process of learning and working to meet their needs. These needs were both physical needs as well as moral, emotional and intellectual needs. According to Marx, human development is characterized by the fact that in the process of meeting their needs, humans develop new needs, implying that at least to some extent they make and remake their own nature. This idea is discussed in more detail by the Hungarian philosopher Ágnes Heller in A Theory of Need in Marx (London: Allison and Busby, 1976). Political economy professor Michael Lebowitz has developed the Marxian interpretation of needs further in two editions of his book Beyond Capital.
Professor György Márkus systematized Marx's ideas about needs as follows: humans are different from other animals because their vital activity, work, is mediated to the satisfaction of needs (an animal who manufactures tools to produce other tools or his/her satisfactors), which makes a human being a universal natural being capable to turn the whole nature into the subject of his/her needs and his/her activity, and develops his/her needs and abilities (essential human forces) and develops himself/herself, a historical-universal being. Work generates the breach of the animal subject-object fusion, thus generating the possibility of human conscience and self-conscience, which tend to universality (the universal conscious being). A human being's conditions as a social being are given by work, but not only by work as it is not possible to live like a human being without a relationship with others: work is social because human beings work for each other with means and abilities produced by prior generations. Human beings are also free entities able to accomplish, during their lifetime, the objective possibilities generated by social evolution, on the basis of their conscious decisions. Freedom should be understood both in a negative (freedom to decide and to establish relationships) and a positive sense (dominion over natural forces and development of human creativity, of the essential human forces. To sum up, the essential interrelated traits of human beings are: a) work is their vital activity; b) human beings are conscious beings; c) human beings are social beings; d) human beings tend to universality, which manifests in the three previous traits and make human beings natural-historical-universal, social-universal and universal conscious entities, and e) human beings are free.
In his texts about what he calls "moral economics", professor Julio Boltvinik Kalinka asserts that the ideas exposed by David Wiggins about needs are correct but insufficient: needs are of a normative nature but they are also factual. These "gross ethical concepts" (as stated by Hilary Putnam) should also include an evaluation: Ross Fitzgerald's criticism of Maslow's ideas rejects the concept of objective human needs and uses instead the concept of preferences. They[who?] assume, just like many other logical positivists, that values cannot be rational and assert, therefore, that the definition of poverty threshold, a task charged with values, is an arbitrary action of researchers, an assumption which implies a narrow view of poverty.
Marshall Rosenberg's model of Compassionate Communication, also known as Nonviolent Communication (NVC) makes the distinction between universal human needs (what sustains and motivates human life) and specific strategies used to meet these needs. Feelings are seen as neither good nor bad, right nor wrong, but as indicators of when human needs are met or unmet. Life-sustaining and life-denying needs are especially highlighted. In contrast to Maslow, Rosenberg's model does not place needs in a hierarchy.
Rosenberg's model supports people developing awareness of feelings as indicators, of what needs are alive within them and others, moment by moment; to forefront needs, to make it more likely and possible for two or more people, to arrive at mutually agreed upon strategies to meet the needs of all parties. Rosenberg diagrams this sequence in part like this: Feelings > Needs > Requests where identifying needs is most significant to the process.
People also talk about the needs of a community or organization. Such needs might include demand for a particular type of business, for a certain government program or entity, or for individuals with particular skills. This is an example of metonymy in language and presents with the logical problem of reification.
Medical needs. In clinical medical practice, it may be difficult to distinguish between treatment a patient needs; treatment that may be desirable;and treatment that could be deemed frivolous. At one end of this spectrum, any practising clinician would accept that a child with fulminating meningococcal meningitis - say - "NEEDS" rapid access to medical care, including resuscitation and intravenous antimicrobials. At the other,rarely could a young healthy woman be deemed to "need" breast augmentation. Numerous surgical procedures fall into this spectrum: particularly, this is so in our ageing Western population, where there is an ever-increasing prevalence of painful, but not life-threatening disorders: typified by the ageing spine.
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