Maslow's hierarchy of needs theory was first proposed by psychologist Abraham Maslow in his 1943 paper "A Theory of Human Motivation" and later expanded in his book Motivation and Personality in 1954. Maslow observed that people are motivated to fulfill basic needs for survival before moving on to pursuing other needs. He categorized human needs into a hierarchical pyramid consisting of 5 levels such as-physiological needs, safety needs, social needs, esteem needs and self-actualization needs

The theory has been stated below.

• Maslow's hierarchy of needs is a theory of motivation proposed by Abraham Maslow.
• It suggests that people are motivated by 5 categories of needs arranged in a hierarchy as stated below.
• Physiological needs: Needs for food, water, sleep, etc required for survival.
• Safety needs: Needs for security, stability and protection from threats.
• Social needs: Needs for belonging, love and relationships with others.
• Esteem needs: Needs for achievement, respect, status and confidence.
• Self-actualization: Needs for realizing one's full potential and creativity.
• Maslow proposed that lower level needs must be at least moderately satisfied before higher level needs can motivate people.
• Physiological needs are the most basic and strongest, followed by safety needs, social needs, esteem needs and self-actualization.
• The levels form a hierarchy wherein satisfying one level of needs allows the next higher level to motivate behavior.
• The theory provides a framework for understanding human motivation and development. However, the strict hierarchy has been criticized.

Physiological Needs

Physiological needs are the most fundamental and pressing human needs. According to Maslow, they must be at least minimally satisfied for a person to pursue higher-level needs for safety, belonging, esteem and self-actualization. Physiological needs have the highest motivation intensity and primacy.

Physiological needs refer to the most basic requirements for human survival and functioning according to Maslow's hierarchy of needs theory. They include the following.

• Food: The need for an adequate and balanced diet to provide the body with essential nutrients for health and energy.
• Water: The need for sufficient intake of water to prevent dehydration and regulate bodily functions.
• Sleep: The need for adequate sleep and rest to allow the body and mind to rejuvenate. Lack of sleep can affect health, mood and productivity.
• Shelter: The need for protection from environmental elements like heat, cold, rain and wind. Shelter provides safety, comfort and security.
• Clothing: The need for clothing and protective wear to regulate body temperature and protect from environmental hazards.
• Oxygen: The need for oxygen for cellular respiration to produce energy in the body. Oxygen deprivation leads to organ damage and eventual death.
• Elimination: The need to expel bodily wastes through excretion and other means to maintain homeostasis.

Safety Needs

Maslow argued that physiological needs are the most basic and must be met first. Among the higher needs, safety needs are the strongest motivators after physiological needs are reasonably fulfilled. However, the intensity of safety needs varies across individuals and situations. Wars and natural disasters tend to intensify safety needs.

According to Maslow, safety needs refer to the desire for security, stability and protection from threats and harm. Some key aspects of safety needs are stated below.

• Physical safety: The need to be safe from physical harm, violence and injury. This includes personal security, public safety and law and order.
• Financial security: The need for a stable income, job security, savings and insurance policies that reduce financial risks and vulnerabilities.
• Health and wellbeing: The need for good health and access to healthcare that protects one from illness and injuries. Includes health insurance, medical facilities etc.
• Security of environment: The need for a secure and stable environment free from natural disasters, chaos and unpredictable changes that threaten safety.
• Predictability and structure: The need for routines, schedules and an ordered way of life that provides a sense of predictability and control. This reduces uncertainties that can make people feel unsafe.

Social Needs

Maslow argued that physiological and safety needs must be reasonably fulfilled before social needs become important motivators. However, individual and cultural differences exist in the primacy and intensity of social needs. For example, people who value individuality may place less importance on social needs.

According to Maslow, social needs refer to the desire for love, belongingness, acceptance and friendship. Some key aspects of social needs are stated below.

• Relationships: The need to establish and maintain relationships with others. This includes relationships with family, friends, romantic partners and connections in the community.
• Belongingness: The need to feel part of a group and have a sense of acceptance and belonging. This includes affiliation with social, religious and cultural groups.
• Affection: The need for love, intimacy and receiving care and attention from others. This involves physical and emotional connection with others.
• Social interaction: The need for positive interactions and spending time with others. Socializing provides companionship and shared human experiences.
• Being valued: The need for feeling valued, understood and cared for by others. This provides a sense of purpose and worthiness.

Esteem Needs

Maslow argued that physiological, safety and social needs must be reasonably satisfied before esteem needs motivate people. Esteem needs are driven by the desire for how one is viewed and treated by others. However, individual and cultural differences exist in the intensity of esteem needs.

According to Maslow, esteem needs refer to the desire for achievement, recognition, mastery, status, reputation, appreciation and respect from others. Some key aspects of esteem needs are stated below.

• Self-esteem: The need for feeling adequate as a person, competent and worthy. Self-esteem involves confidence, respect and value for oneself.
• Self-respect: The need to gain one's own approval and respect oneself. This involves living according to one's moral principles and values.
• Achievement: The need to accomplish meaningful goals, overcome challenges and perform productively. Success and mastery lead to fulfillment of esteem needs.
• Reputation: The need for recognition, status and good opinion from others. Reputation arises from achievements, abilities and good conduct.
• Appreciation: The need for being valued and recognized by others for one's efforts, contributions and qualities. Receiving praise and compliments fulfills esteem needs.
• Attention: The need for being noticed, given importance and prominence. Attention indicates that one is significant and worthy of notice.

Maslow argued that only a small percentage of people achieve self-actualization as it requires fulfillment of all lower needs. Self-actualized individuals are creative, autonomous, tolerant and able to perceive reality objectively. However, not everyone places the same importance on self-actualization needs.

According to Maslow, self-actualization needs refer to the desire to fulfill one's full potential and realize one's true capabilities and purpose in life. Some key aspects of self-actualization needs are stated below.

• Personal growth: The need for continued development of one's knowledge, skills and abilities to their highest possible level. This involves lifelong learning.
• Autonomy: The need to be independent and self-directed, and to act according to one's own principles. This requires freedom from external influences.
• Creativity: The need for innovation and using one's imagination to generate new ideas, develop unique solutions and express oneself artistically.
• Problem-solving: The drive to analyze and understand complex problems and figure out effective solutions. This involves using higher-order thinking skills.
• Purpose in life: The need to find meaning and purpose that goes beyond materialistic concerns. People seek a sense of mission and direction in life.

The assumptions of Maslow’s Need Hierarchy Theory has been stated below.

• The needs form a hierarchy - Maslow assumed that people pursue lower level physiological and safety needs before higher level social, esteem and self-actualization needs.
• Prepotency of needs - Maslow believed that lower level needs have a "prepotency" in motivating behavior over higher level needs. Once a need is fulfilled, the next higher need dominates motivation.
• Continuum of relative satisfaction - Maslow argued that needs are never fully satisfied but are relatively met to a level that allows higher needs to emerge. It is a continuous process.
• Need for self-actualization - Maslow assumed that all people have an innate desire to realize their full potential and achieve self-actualization, though only a few succeed.
• Predictable stages of development - Maslow proposed that human needs, motivations and personalities develop through predictable and sequential stages corresponding to the hierarchy.
• Culturally universal hierarchy - Maslow assumed the need hierarchy is universal and applies to all human beings across cultures. However, the intensity of needs may vary.
• Holistic view of needs - Maslow saw human needs holistically rather than in isolation. The hierarchy provides an integrated perspective of human motivation.