The term "Psychological ballet" has been used in reference to Antony Tudor's ballets dating from John Martin's January 16, 1940, review of "Lilac Garden" in The New York Times. Until this thesis, the psychological ballet as a genre has been overlooked and left undefined. The Psychological Ballet can be defined by: (1) using Antony Tudor's "Pillar of Fire" as a model example and (2) analyzing the term "psychological ballet" into its two components "Psychological," and "Ballet," respectively. The contribution of drama, with attention to character, is explored. Those dance works which do not fall under the category of Psychological Ballet but are works whose themes "have mental origin or are affected by mental conflicts and/or states" will be defined as Psychogenic Works.