Maslow saw human beings' needs arranged like a ladder. The most basic needs, at the bottom, were physical -- air, water, food, sex. Then came safety needs -- security, stability -- followed by ...

Abraham Maslow ... human behavior. Specifically, he was interested in what motivated people, and he devised five levels in the shape of a pyramid representing each of those needs.

Abraham Maslow’s Hierarchy of Needs is one of the most well-known psychological models, illustrating human motivation as ... esteem that was only found in 5–10 percent of his own population.” ...