Gellius says that in his day humanitas is commonly used as a synonym for philanthropy – or kindness and benevolence toward one's fellow human being. Gellius maintains that this common usage is wrong, and that model writers of Latin, such as Cicero and others, used the word only to mean what we might call "humane" or "polite" learning, or the Greek equivalent Paideia. Gellius became a favorite author in the Italian Renaissance, and, in fifteenth-century Italy, teachers and scholars of philosophy, poetry, and rhetoric were called and called themselves "humanists". Modern scholars, however, point out that Cicero (106 – 43 BCE), who was most responsible for defining and popularizing the term humanitas, in fact frequently used the word in both senses, as did his near contemporaries. For Cicero, a lawyer, what most distinguished humans from brutes was speech, which, allied to reason, could (and should) enable them to settle disputes and live together in concord and harmony under the rule of law. Thus humanitas included two meanings from the outset and these continue in the modern derivative, humanism, which even today can refer to both humanitarian benevolence and to scholarship.
What is the characteristic that most separates humans from animals?
speech