Maslow

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.
The five levels of the hierarchy are physiological, safety, love/belonging, esteem, and self-actualization.
Lower-level basic needs like food, water, and safety must be met first before higher needs can be fulfilled.
Few people are believed to reach the level of self-actualization, but we can all have moments of peak experiences.
The order of the levels is not completely fixed. For some, esteem outweighs love, while others may self-actualize despite poverty. Our behaviors are usually motivated by multiple needs simultaneously.
Applications include workplace motivation, education, counseling, and nursing.