Egoism ... for the agent (i.e., one's own self-interest)
Agent-based Theories
Determine whether moral agents are “virtuous” or “vicious”.
I.e., a person’s moral character is morally praiseworthy / blameworthy depending on something inherent to the agent’s relationship to others.
Theories of Moral Character
The praiseworthy / blameworthy -ness of a moral agent is determined not solely by their individual actions but partly by their motivations & ability to cultivate certain virtues / relationships over a lifetime
Cultivate relationship building & sustaining emotions (e.g., care). An approach to morality aimed at advancing women’s interests, underscoring their distinctive experiences and characteristics, and advancing the obvious truth that women and men are morally equal
Imagine you were to explain to a child (who has gotten in trouble at school for taking another student's lunch money) why their action was "wrong" [presuming you think it is - if you don't; you are most likely a short-term egoist or amoralist of some kind]. Your intuitions on which explanation best captures the wrong-making features of the action may give you insight into which ethical theory most aligns with your system of morality.
Relativism
Stealing is right or wrong in [select 1]: one's mind / culture / context
Deontology
Stealing is wrong because it violates rationality (Kant) / God's commands (Divine Command)
Consequentialism
Stealing is wrong because it can harm you (egoism) and / or the person whose property was taken (utilitarianism)
Virtue Ethics
Stealing is wrong because it cultivates vicious habits (i.e., thief / criminal)
Care Ethics
Stealing is wrong because it makes one untrustworthy & harms relationships