For 10 points, name  this psychologist, who developed a namesake hierarchy of needs.
Clayton Alderfer created the ERG Theory as a refinement of this man's most famous  contribution. This author of A Theory of Human Motivation claimed that people have "peak  experiences" as a period of interconnectedness and joy, and this man studied "exemplary people"  such as Albert Einstein and Frederick Douglass. This man's most famous creation has categories  such as "physiological" and "esteem," and at the top is "self-actualization." For 10 points, name  this psychologist, who developed a namesake hierarchy of needs.
Clayton Alderfer created the ERG Theory as a refinement of this man's most famous  contribution.
Abraham Maslow