This cheat sheet compares three major ethical frameworks: Kantian deontology, utilitarianism, and Aristotelian virtue ethics. Students need it because many philosophy questions ask not only what action is right, but why it is right. These frameworks give different tools for judging moral choices, building arguments, and evaluating real-life dilemmas.
A clear side-by-side reference helps students avoid mixing up duties, outcomes, and character.
Key Facts
- Deontology judges actions by whether they follow moral duties or rules, not by whether they produce good consequences.
- Kant's categorical imperative says to act only on a rule that you could rationally will to become a universal law.
- Kantian ethics says people must be treated as ends in themselves, never merely as means to someone else's goal.
- Utilitarianism judges actions by their consequences and says the right action is the one that produces the greatest overall happiness or well-being.
- A simple utilitarian calculation is net utility = total benefits minus total harms for everyone affected.
- Act utilitarianism evaluates each individual action by its results, while rule utilitarianism supports rules that usually produce the best results.
- Virtue ethics judges morality by the character and habits of the person acting, not only by rules or outcomes.
- Aristotle's golden mean says a virtue is often the balanced middle between two extremes, such as courage between cowardice and recklessness.
Vocabulary
- Deontology
- An ethical framework that judges actions by whether they follow moral duties, rules, or principles.
- Categorical Imperative
- Kant's rule that a person should act only according to principles that could be universal laws for everyone.
- Utilitarianism
- An ethical framework that judges actions by how much overall happiness, well-being, or benefit they produce.
- Utility
- The total amount of happiness, benefit, or well-being produced by an action or rule.
- Virtue Ethics
- An ethical framework that focuses on developing good character traits and living a flourishing human life.
- Golden Mean
- Aristotle's idea that many virtues are balanced habits between extremes of too little and too much.
Common Mistakes to Avoid
- Saying deontology ignores consequences completely is misleading because consequences may matter in life, but they do not determine whether the action follows duty.
- Using utilitarianism to justify any harmful act is wrong because a true utilitarian argument must count the harms and benefits for everyone affected, not only one person or group.
- Confusing act utilitarianism with rule utilitarianism leads to weak analysis because act utilitarianism judges one action, while rule utilitarianism judges the effects of following a general rule.
- Treating virtue ethics as just being nice is too vague because virtue ethics focuses on stable character traits, practical wisdom, and balanced habits.
- Applying Kant's universal law test only to the result is wrong because the test examines the principle or rule behind the action.
Practice Questions
- 1 A policy gives 80 people a benefit worth 5 utility points each but causes 20 people a harm worth 8 utility points each. What is the net utility, and would a basic utilitarian support it?
- 2 Action A creates 60 total benefit points and 15 total harm points. Action B creates 45 total benefit points and 5 total harm points. Which action has greater net utility?
- 3 A student lies to avoid getting a friend in trouble. Explain how a Kantian deontologist, a utilitarian, and a virtue ethicist might evaluate the student's choice.
- 4 Why might two ethical frameworks reach different conclusions about the same action even when they agree on the facts of the case?
Understanding Ethical Frameworks (Deontology, Utilitarianism, Virtue)
The theories become most useful when a choice has a real cost. Consider a school leader who can publish private messages to expose bullying. The messages may help protect future students, but publishing them may violate trust and embarrass people who did not cause the harm.
A duty-based approach asks whether the leader has a duty to respect privacy and fairness. A consequence-based approach estimates who may be helped or harmed, including victims, bystanders, and the wider school community.
A character-based approach considers what a just, courageous, and compassionate leader would do. Each approach directs attention to a different part of the same case.
Good ethical reasoning needs more than picking a theory that supports a first reaction. Students should state the relevant facts, identify everyone affected, and notice uncertainty. Consequences are often hard to predict.
A policy that seems helpful now may create fear or distrust later. Duties can conflict too. Telling the truth may clash with keeping a promise or preventing harm.
In those cases, explain which duty seems stronger and why. Virtue ethics requires care as well.
Calling someone brave does not settle a case if their action was careless or cruel. Character is shown through repeated choices, judgment, and willingness to learn from mistakes.
These frameworks appear outside philosophy class. Doctors must respect patient choices while considering treatment outcomes. Businesses decide whether to protect customer data even when selling it could increase profit.
Friends face choices about honesty, loyalty, and gossip. Governments create rules about safety, punishment, and public spending. In each setting, ethical language can hide assumptions.
A person may claim that an action benefits most people while ignoring a smaller group that bears serious harm. Another person may defend a strict rule without considering whether it treats people fairly in unusual circumstances. Naming the assumptions makes an argument clearer and easier to challenge.
When writing an ethics response, avoid saying that one framework simply cares and another does not. All three can take suffering seriously, but they explain moral importance differently. Use a specific action rather than a vague claim.
Then show the reasoning step by step. For a duty-based argument, identify the rule behind the action and test whether it could guide everyone. For an outcome-based argument, include short-term and long-term effects on all affected groups.
For a virtue-based argument, name the virtue involved, the two possible extremes, and the practical judgment needed in the situation. A strong conclusion can admit that a case remains difficult while still defending one answer with reasons.