The contemporary philosophy of mind and neuroethics are two of the liveliest fields of interdisciplinary reflection which deal with the everlasting topic: what/who we essentially are. One of the many questions that can be tackled in order to go deep in this knowledge is: why man is naturally inclined towards specific tiers for survival which constitute his/her teleological project of flourishing? Two different, but complementary, answers are brought to light in this work. The author argues for an apparently obvious, but (...) relatively underexplored view of the classical hylomorphic concept of form, not just as the information that characterizes the organization of human body, but also as the intrinsic final reason why, through a specific type of bodily structure, the human being develops his/her natural inclinations and behaves according to them. The author advances the argument in terms of an upward comparison between the threefold levels of Thomas Aquinas’ natural human inclinations according to Summa Theologiae I-II, question 94, article 2, and the pioneering structural and functional “Triune Brain” model developed from 1949 to 1952 by Paul MacLean. The hylomorphic view sketched is profoundly different from a purely materialistic conception of teleological processes of human behavior, and it is a plausible explanation that motivates and invites further considerations and research. (shrink)