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Need

Thing that is necessary for an organism to live a healthy life

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Basic needs such as air, water, food and protection from environmental dangers are necessary for an organism to live. In addition to basic needs, humans also have needs of a social or societal nature such as the human need for purpose, to socialize, to belong to a family or community or other group. Needs can be objective and physical, such as the need for food, or psychical and subjective, such as the need for self-esteem. Understanding both kinds of "unmet needs" is improved by considering the social context of their not being fulfilled.

Needs and wants are a matter of interest in, and form a common substrate for, the fields of philosophy, biology, psychology, social science, economics, marketing and politics, and for a number of helping and health professions, including social work.

Psychological definition

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 hierarchy of needs in 1943. His theory proposed that people have a hierarchy of psychological needs, which range from basic physiological or lower order needs such as food, water and safety (e.g. shelter) through to the higher order needs such as self-actualization. People tend to spend most of their resources (time, energy and finances) attempting to satisfy these basic before the higher order needs of belonging, esteem and self-actualization become meaningful. Maslow's approach is a generalised model for understanding human motivations in a wide variety of contexts but must be adapted for specific contexts. While intuitively appealing, Maslow's model has been difficult to operationalize experimentally. It was developed further by Clayton Alderfer.

The academic study of needs, which was at its zenith in the 1950s. One exception involves Richard Sennett's work on the importance of respect.

One difficulty with a psychological theory of needs is that conceptions of "need" may vary radically among different cultures or among different parts of the same society. For a psychological theory of human need, one found compatible with the Doyal/Gough Theory, see Self-Determination Theory (SDT).

Self-determination theory (SDT) has been the subject of a full-length volume by the late Edward L. Deci and Richard M. Ryan, who summarized the progress of theory, research and application of SDT in Self-Determination Theory: Basic Psychological Needs in Motivation, Development, and Wellness (Deci & Ryan, 2017).

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Source and licence. Adapted from the Wikipedia article “Need” (this version, 2026-10-01) by its contributors, shared under CC BY-SA 4.0. Lablypedia has left out its tables, references and most pictures, and linked it to other Lablypedia articles.