Utilitarianism is an ethical theory that holds that the right action is the one that produces the greatest amount of good for the greatest number of people.

Ontology is the branch of metaphysics that studies the nature of reality, including the fundamental categories of being and the properties of entities.

Deontology is an ethical theory that holds that the rightness or wrongness of an action is determined by whether it conforms to a set of moral rules or principles.

Temporal Ontology is the branch of metaphysics that studies the nature of time, including its structure, properties, and relationship to other aspects of reality.

Virtue Ethics is an ethical theory that holds that the right action is the one that is performed by a virtuous person.

Philosophy of Mind is the branch of metaphysics that studies the nature of consciousness, including its relationship to the physical world and the brain.

Existentialism is an ethical theory that emphasizes the importance of individual freedom and choice in determining the rightness or wrongness of an action.

Ontology is the branch of metaphysics that studies the nature of existence, including the fundamental categories of being and the properties of entities.

Social Contract Theory is an ethical theory that holds that the right action is the one that is in accordance with the terms of a hypothetical social contract.

Metaphysics of Causation is the branch of metaphysics that studies the nature of causation, including the relationship between cause and effect and the different types of causation.

Eudaimonia is an ethical theory that emphasizes the importance of human flourishing and well-being in determining the rightness or wrongness of an action.

Metaphysics of Properties is the branch of metaphysics that studies the nature of properties, including their relationship to substances and the different types of properties.

Ethics of Care is an ethical theory that emphasizes the importance of empathy and compassion in determining the rightness or wrongness of an action.

Philosophy of Space is the branch of metaphysics that studies the nature of space, including its structure, properties, and relationship to other aspects of reality.

Non-maleficence is an ethical theory that emphasizes the importance of avoiding harm and suffering in determining the rightness or wrongness of an action.