Maslow's hierarchy of needs
Maslow's hierarchy of needs is a conceptualisation of the needs that motivate human behaviour, which was proposed by the American psychologist Abraham Maslow. According to Maslow's original formulation, there are five sets of basic needs that are related to each other in a hierarchy of prepotency. Typically, the hierarchy is depicted in the form of a pyramid although Maslow himself was not responsible for the iconic diagram. The pyramid begins at the bottom with physiological needs and culminates at the top with self-actualization needs. In his later writings, Maslow added a sixth level of "meta-needs" and metamotivation.
Source: Wikipedia
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply.