In his doctoral dissertation at the University of Wisconsin, he showed through experiments on apes that male dominance is established by eye contact, 
In his doctoral dissertation at the University of Wisconsin, he showed through experiments on apes that male dominance is established by eye contact, not fighting. He introduced the phrase peak experience to describe the best moments in life, and argued that most people had to satisfy the lower needs -- physical, safety, and belonging -- before they could get to esteem. FTP, identify this psychologist, who discussed those needs in 1943s A Theory of Human Motivation, and who later added self-actualization to that hierarchy.
In his doctoral dissertation at the University of Wisconsin, he showed through experiments on apes that male dominance is established by eye contact, not fighting.
Abraham {Maslow}