All professionals are familiar with Maslow’s hierarchy of needs,
typically represented by a pyramid. It is well known that there is
no relevant empirical support for the model. Still, the needs
themselves are indisputable at a basic level, so as a generic
approach, development theorists, motivation researchers, and
experts are attracted to the verification, validation, or refutation
of these needs. In this article, the authors summarize what
Maslow started with his motivational research and where
subsequent generations of experts have arrived in terms of
known needs.