This definition is not static, as it is subject to interpretation by each individual. It is used in this guide to designate the physiological needs associated with rational and necessary consumption. Abraham Maslow, an American humanistic psychologist (1916-1972), identified five types of basic needs that are still referred to today and that he classified as follows:
1. Vital or physiological needs (eating, drinking, sleeping, breathing, etc.)
2. Safety and protection needs (personal security, employment, health, property, etc.)
3. Social needs (love, friendship, belonging, etc.)
4. Self-esteem needs (confidence, respect for others, etc.)
5. Self-actualization needs (personal accomplishment)