These included aspects that Abraham Maslow, a psychologist in the 1950s, defined as “Hierarchy of Needs”. Maslow’s theory postulates that human needs operate at five levels in the form of a ...

"I was awfully curious to find out why I didn't go insane," remarked Abraham Maslow ... of a heirarchy of needs, metaneeds, self-actualizing persons, and peak experiences. Maslow became the ...