Consequentialism, particularly utilitarianism, focuses on the consequences of an action and judges its morality based on whether it maximizes overall well-being or happiness.

The categorical imperative is a fundamental principle in Kantian ethics that requires actions to be guided by universal moral laws that can be consistently applied to all rational beings.

Virtue ethics, as exemplified by Aristotle's philosophy, focuses on the development of virtues, such as courage, temperance, and wisdom, as the basis for ethical decision-making.

The principle of utility, central to utilitarianism, states that the right action is the one that produces the greatest amount of good or happiness for the greatest number of people.

Deontology, as exemplified by Immanuel Kant's philosophy, emphasizes the importance of acting according to moral rules and duties, regardless of the consequences of those actions.

In virtue ethics, phronesis is the practical wisdom that enables individuals to navigate ethical dilemmas, make sound judgments, and act in accordance with virtues.

Existentialism, as exemplified by the philosophies of Jean-Paul Sartre and Albert Camus, emphasizes individual freedom, responsibility, and the creation of meaning in a world without inherent moral values.

Act utilitarianism evaluates the morality of an action based on its specific consequences, while rule utilitarianism evaluates the morality of an action based on whether it follows a rule that would maximize overall happiness if everyone followed it.

Deontology, particularly Kantian ethics, emphasizes the importance of following moral rules and principles, regardless of the consequences, because these rules are based on reason and universal moral principles.

In virtue ethics, virtues and happiness are seen as mutually reinforcing, with virtues being necessary for achieving genuine happiness and happiness being a natural consequence of living a virtuous life.

Care ethics, as exemplified by the philosophies of Carol Gilligan and Nel Noddings, emphasizes the importance of empathy, compassion, and relationships in moral decision-making, focusing on the well-being of others.

Hedonistic utilitarianism defines well-being in terms of pleasure, while preference utilitarianism defines well-being in terms of the satisfaction of preferences, regardless of whether those preferences are for pleasure or other things.

Social justice ethics, as exemplified by the philosophies of John Rawls and Martha Nussbaum, emphasizes the importance of social justice, equality, and the fair distribution of resources in moral decision-making.

In deontology, perfect duties are absolute and must be fulfilled regardless of the consequences, while imperfect duties are less stringent and can be neglected in certain circumstances.

Existentialism, particularly the philosophies of Jean-Paul Sartre and Albert Camus, emphasizes the importance of authenticity, self-realization, and individual freedom in moral decision-making.