Teleology, also known as consequentialism, is an ethical theory that evaluates the morality of actions based on their outcomes or consequences.

Kant's Categorical Imperative is a moral principle that requires actions to be performed out of duty and respect for the moral law, regardless of personal desires or consequences.

Virtue ethics emphasizes the importance of developing and cultivating moral virtues, such as honesty, courage, and justice, as the foundation of ethical conduct.

Deontology, also known as duty-based ethics, holds that the morality of actions is determined by their conformity to moral rules or principles, regardless of their consequences.

Moral relativism asserts that moral values and principles are not absolute or universal, but rather vary depending on the cultural, historical, and societal context.

Existentialism emphasizes the importance of individual freedom and choice, arguing that individuals have the responsibility to create their own meaning and values in life.

Metaethics is a branch of ethics that investigates the nature of moral properties, such as goodness, rightness, and wrongness, and the relationship between moral language and reality.

Ethical egoism asserts that the rightness or wrongness of an action is determined solely by whether it promotes the agent's own self-interest.

Normative ethics is a branch of ethics that investigates the justification of moral principles and the criteria for determining right and wrong conduct.

Social Contract Theory argues that moral principles are derived from an implicit agreement among individuals in a society to cooperate and respect each other's rights.

Moral absolutism asserts that there are objective moral truths that apply to all people, regardless of their culture, beliefs, or circumstances.

Care Ethics emphasizes the importance of caring for others and promoting their well-being as the foundation of ethical conduct.

Applied ethics is a branch of ethics that investigates the application of moral principles to specific moral problems and dilemmas, such as abortion, euthanasia, and environmental issues.

Libertarianism emphasizes the importance of individual liberty and autonomy, arguing that individuals have the right to make their own choices and pursue their own interests, as long as they do not harm others.

Descriptive ethics is a branch of ethics that investigates the moral beliefs, values, and practices of different cultures and societies.