The article presents Bartolomé de las Casas's theory of man, mainly taken from the Aristotelian tradition, Thomas Aquinas, Francisco de Vitoria, from Christianity and from his experience as a settler and cleric, a practical complement that allowed him to understand the American man from a philosophical-anthropological perspective, with particular attributes emanating from the human nature itself and the geographical contexts in which he lives. The following work will consist of the theoretical sources from which Bartolomé de las Casas takes his philosophy on man: Aristotle, Thomas Aquinas; and the Bible, to conclude with the concept of Lascasian man taken from the combination of the theories read as of the experience in the American territory. [ABSTRACT FROM AUTHOR]