Four temperaments is a proto-psychological theory that suggests that there are four fundamental personality types, sanguine (optimistic and social), choleric (short-tempered or irritable), melancholic (analytical and quiet), and phlegmatic (relaxed and peaceful). Most formulations include the possibility of mixtures of the types.
The Greek physician Hippocrates (c. 460 – c. 370 BC) incorporated the four temperaments into his medical theories as part of the ancient medical concept of humorism, that four bodily fluids affect human personality traits and behaviors. Later discoveries in biochemistry have led modern medicine science to reject the theory of the four temperaments, although some personality type systems of varying scientific acceptance continue to use four or more categories of a similar nature.
The Four Temperaments is a ballet made by New York City Ballet co-founder and ballet master George Balanchine to music he commissioned from Paul Hindemith (the latter's eponymous 1940 music for string orchestra and piano) for the opening program of Ballet Society, immediate forerunner of City Ballet.
The work is divided into five parts, a theme and four variations, which reflect the temperaments. Balanchine downplayed the references to medieval "humors" that were believed to determine a person's temperament, saying the four personality types—melancholic, sanguinic, phlegmatic, and choleric—were merely points of departure for the creation of abstract music and dance.
The première took place on Wednesday, 20 November 1946, at the Central High School of Needle Trades, New York City, with mise en scène by Kurt Seligmann and lighting by Jean Rosenthal. Leon Barzin conducted and the pianist was Nicholas Kopeikine. The City Ballet première was held in 1951 in practice clothes and without scenery; in 1964 it received new lighting at the New York State Theater, Lincoln Center, by David Hays. NYCB principal dancer Albert Evans chose to include The Four Temperaments in his farewell performance, Sunday, June 20, 2010.