Maslow’s hierarchy of needs is a motivational theory in psychology comprising a five-tier model of human needs, often depicted as hierarchical levels within a pyramid. From the bottom of the hierarchy upwards, the needs are: physiological (food and clothing), safety (job security), love and belonging needs (friendship), esteem, and self-actualization. Needs lower down in the hierarchy must be satisfied before individuals can attend to needs higher up.

This five-stage model can be divided into deficiency needs and growth needs. The first four levels are often referred to as deficiency needs (D-needs), and the top level is known as growth or being needs (B-needs).

Deficiency needs arise due to deprivation and are said to motivate people when they are unmet. Also, the motivation to fulfill such needs will become stronger the longer the duration they are denied. For example, the longer a person goes without food, the more hungry they will become.

Maslow (1943) initially stated that individuals must satisfy lower-level deficit needs before progressing on to meet higher-level growth needs. However, he later clarified that satisfaction of a need is not an “all-or-none” phenomenon, admitting that his earlier statements may have given “the false impression that a need must be satisfied 100 percent before the next need emerges” (1987, p. 69).

When a deficit need has been ‘more or less’ satisfied it will go away, and our activities become habitually directed toward meeting the next set of needs that we have yet to satisfy. These then become our salient needs. However, growth needs continue to be felt and may even become stronger once they have been engaged.

Growth needs do not stem from a lack of something, but rather from a desire to grow as a person. Once these growth needs have been reasonably satisfied, one may be able to reach the highest level called self-actualization.

Every person is capable and has the desire to move up the hierarchy toward a level of self-actualization. Unfortunately, progress is often disrupted by a failure to meet lower-level needs. Life experiences, including divorce and the loss of a job, may cause an individual to fluctuate between levels of the hierarchy.

Therefore, not everyone will move through the hierarchy in a uni-directional manner but may move back and forth between the different types of needs.

Maslow (1943, 1954) stated that people are motivated to achieve certain needs and that some needs take precedence over others.

Our most basic need is for physical survival, and this will be the first thing that motivates our behavior. Once that level is fulfilled the next level up is what motivates us, and so on.

1. Physiological needs – these are biological requirements for human survival, e.g. air, food, drink, shelter, clothing, warmth, sex, and sleep.

If these needs are not satisfied the human body cannot function optimally. Maslow considered physiological needs the most important as all the other needs become secondary until these needs are met.

2. Safety needs – once an individual’s physiological needs are satisfied, the needs for security and safety become salient. People want to experience order, predictability, and control in their lives. These needs can be fulfilled by the family and society (e.g. police, schools, business, and medical care).

For example, emotional security, financial security (e.g. employment, social welfare), law and order, freedom from fear, social stability, property, health, and wellbeing (e.g. safety against accidents and injury).

3. Love and belongingness needs – after physiological and safety needs have been fulfilled, the third level of human needs is social and involves feelings of belongingness. Belongingness, refers to a human emotional need for interpersonal relationships, affiliating, connectedness, and being part of a group.

Examples of belongingness needs include friendship, intimacy, trust, acceptance, receiving and giving affection, and love.

4. Esteem needs are the fourth level in Maslow’s hierarchy and include self-worth, accomplishment, and respect. Maslow classified esteem needs into two categories: (i) esteem for oneself (dignity, achievement, mastery, independence) and (ii) the desire for reputation or respect from others (e.g., status, prestige).

Maslow indicated that the need for respect or reputation is most important for children and adolescents and precedes real self-esteem or dignity.

5. Self-actualization needs are the highest level in Maslow’s hierarchy, and refer to the realization of a person’s potential, self-fulfillment, seeking personal growth, and peak experiences. Maslow (1943) describes this level as the desire to accomplish everything that one can, to become the most that one can be. Individuals may perceive or focus on this need very specifically. For example, one individual may have a strong desire to become an ideal parent. In another, the desire may be expressed economically, academically, or athletically. For others, it may be expressed creatively, in paintings, pictures, or inventions.

Maslow continued to refine his theory based on the concept of a hierarchy of needs over several decades (Maslow, 1943, 1962, 1987).

Regarding the structure of his hierarchy, Maslow (1987) proposed that the order in the hierarchy “is not nearly as rigid” (p. 68) as he may have implied in his earlier description.

Maslow noted that the order of needs might be flexible based on external circumstances or individual differences. For example, he notes that for some individuals, the need for self-esteem is more important than the need for love. For others, the need for creative fulfillment may supersede even the most basic needs.

Maslow (1987) also pointed out that most behavior is multi-motivated and noted that “any behavior tends to be determined by several or all of the basic needs simultaneously rather than by only one of them” (p. 71).

It is important to note that Maslow’s (1943, 1954) five-stage model has been expanded to include cognitive and aesthetic needs (Maslow, 1970a) and later transcendence needs (Maslow, 1970b).

Changes to the original five-stage model are highlighted and include a seven-stage model and an eight-stage model; both developed during the 1960s and 1970s.

1. Biological and physiological needs – air, food, drink, shelter, warmth, sex, sleep, etc.

2. Safety needs – protection from elements, security, order, law, stability, and freedom from fear.

3. Love and belongingness need – friendship, intimacy, trust, and acceptance, receiving and giving affection and love. Affiliating, being part of a group (family, friends, work).

4. Esteem needs – which Maslow classified into two categories: (i) esteem for oneself (dignity, achievement, mastery, independence) and (ii) the need to be accepted and valued by others (e.g., status, prestige).

7. Self-actualization needs – realizing personal potential, self-fulfillment, seeking personal growth, and peak experiences. A desire “to become everything one is capable of becoming”(Maslow, 1987, p. 64).