Consequentialism: The morality of actions depends only on their consequences.

Deontology: There are moral principles that forbid certain actions and encourage other actions purely based on the nature of the action itself, not on its consequences.

Virtue ethics: Ethical theory should not be in the business of evaluating actions. It should be in the business of evaluating character traits. The fundamental question of ethics is not "What makes an action right or wrong?" It is "What makes a person good or bad?"