"The good is the object of all desire" - Aristotle
Metaphysics is the study of being, which is defined as that which is
The human person studies substances and accidents:
Substance refers to the "whatness" or the type of reality
Accidents are the attributes of a substance
Dualism theories:
Dualism posits that humans are immaterial souls and physical bodies
Rene Descartes' cogito ergo sum (I think therefore I am) highlights the two substances of being human: the physical (body) and the non-physical (mind/soul)
Thomas Reid's dualism emphasizes that the self is a continued existence, with identity dependent on memory but not solely based on memory
Animalism views humans as animal-persons with qualities such as rationality, intelligence, and self-consciousness
The Thinking Animal Argument asserts that human persons are fundamentally human beings
Identity as a human person depends on being the same human animal over time
Constitutionalism argues that humans are not immaterial souls, nor identical to any material or biological substance, but are constituted by such substances
Constitutionalism distinguishes between "you" and "your animal body" as materially coincidental but not numerically identical
The Ship of Theseus illustrates the concept of material constitution
Humeanism, or the Bundles Theory, posits that persons are not substances but bundles of perceptions
Humean identity is based on psychological continuity, with no underlying person, only a bundle of properties
Derek Parfit's Humeanism emphasizes the Psychological Criterion of Personal Identity, where identity is based on unique psychological continuity