- It's a motivational theory in psychology comprising stages of human needs.
- [Abraham Maslow](https://en.wikipedia.org/wiki/Abraham_Maslow) proposed this theory in 1943 in his paper "A Theory of Human Motivation."
- From the bottom of the hierarchy upwards, the needs are:
- **Physiologica**l: the biological component for human survival, as air, water, food, sex.
- **Safety**: personal, emotional, and financial security.
- **Love and Social Belonging**: interpersonal and feelings of belongingness, including family, friendship, and intimacy.
- **Esteem Needs**: status, recognition, fame, competency, mastery, self-confidence, and freedom.
- **Cognitive**: creativity, predictability, curiosity, and meaning.
- **Aesthetic**: extracting the world's beauty.
- **Self-actualization**: the realization of one's full potential. Partner acquisition and pursuing goals.
- **Transcendence**: spiritual needs.
- [Dr. Saul McLeod. Maslow's Hierarchy of Needs](https://www.simplypsychology.org/maslow.html)
- [Wikipedia. Maslow's hierarchy of needs](https://en.wikipedia.org/wiki/Maslow%27s_hierarchy_of_needs)