 In Galen's view, an imbalance of each humor corresponded with a particular human temperament (blood—sanguine, black bile—melancholic, yellow bile—choleric, and phlegm—phlegmatic).Thus, individuals with sanguine temperaments are extroverted and social; choleric people have energy, passion, and charisma; melancholics are creative, kind, and considerate; and phlegmatic temperaments are characterized by dependability, kindness, and affection.Galen's principal interest was in human anatomy, but Roman law had prohibited the dissection of human cadavers since about 150 BC.