What is applied ethics?
Ethics asks what is right and wrong and why. Applied ethics uses those ideas on real, concrete problems, such as "Should this app collect my location?" or "Is it fair to test medicines on animals?"
It needs two things: facts (what is actually happening) and values (what matters, like life, fairness, freedom, honesty). Facts alone cannot tell us what we ought to do, and values without facts can lead to bad choices.
Three lenses
- Consequences: choose what brings the most good and least harm for everyone affected.
- Duty and rights: some things are right or wrong in themselves, like keeping promises, telling the truth and respecting consent.
- Character (virtue): ask what an honest, brave, fair and caring person would do.
When the lenses agree, the answer is clear. When they disagree, you have a real dilemma and must weigh them carefully.
Ethics of personal life
Everyday life is full of moral choices: honesty with friends and family, keeping promises, loyalty versus fairness (should you report a friend who cheats?), respect in relationships, consent, and how we treat people online.
Example: a white lie. Saying you love a gift you dislike protects feelings but bends the truth. A better path often keeps both values: "Thank you for remembering me, that was so kind." This is a key skill in applied ethics: searching for a third option instead of picking only between two bad ones.
Personal ethics also covers caring for your own health, using your time and money responsibly, and caring for people who depend on you.
Ethics of science and technology
New tools bring new questions:
- Privacy and data: apps and cameras collect information. Who owns it? Did people agree?
- Artificial intelligence: an AI trained on unfair data can treat some groups unfairly. Who is responsible when it is wrong?
- Medicine and genes: gene editing might cure inherited disease, but long-term effects are unknown. Informed consent and safety tests are duties.
- Research honesty: scientists must not fake results and must protect people in experiments.
A helpful tool is a stakeholder map: list everyone who gains or loses. A face-recognition system may help police and shops, but people wrongly matched and peaceful protesters may lose. A good decision reduces harm to the people who pay the cost. The precautionary principle says: when serious harm is possible but uncertain, go carefully.
Animals, nature and future generations
Who deserves moral concern? Over history, the circle of concern has widened: from family and tribe, to all people, to animals that can feel pain, and to nature and people not yet born.
- Animal welfare: animals can suffer, so causing needless pain is wrong. Debates: factory farming, animal testing, zoos.
- Animal rights: some argue animals have rights, so they should never be used only as tools.
- Nature: forests, rivers and species may have value in themselves, not only as resources. Some countries have given rivers legal rights.
- Future generations: climate change and waste affect people who have no vote today. Sustainability means meeting our needs without stealing theirs.
Property, work and technology
Things people make raise questions of fairness:
- Property: what makes something yours? Your work, a fair exchange, a gift. Copying music, games or writing without permission takes away the maker's reward (intellectual property).
- Work: fair pay, safe workplaces, no child labour, respect for workers in supply chains (who made your phone or T-shirt?).
- Machines and jobs: automation makes goods cheaper but can replace jobs. A fair society helps workers learn new skills.
- Repair and waste: products made to break quickly waste resources; a right to repair is now debated in many countries.
How to make a moral judgement: 5 steps
- Facts: what exactly is happening? Check evidence, not rumours.
- Stakeholders: who is affected, and how much?
- Options: list at least three choices, including creative ones.
- Principles: test each option with the three lenses: consequences, duty and rights, character.
- Decide and explain: choose, give your reasons, and be ready to change your mind if new facts appear.
Action theory reminds us that we judge an action by the intention (what the person meant), the act itself and its results. Someone who causes harm by accident is judged differently from someone who planned it, but both may need to repair the damage.
Try it
Pick a real question from your life this week (sharing a password, forwarding a rumour, eating meat, buying fast fashion). Write one line for each of the 5 steps. Then use the case picker in the 3D to compare with the lenses.
Key formulas and definitions
- Applied ethics: using moral ideas on real, concrete problems
- Consequences lens: most good, least harm for all affected
- Duty lens: rules, rights, promises, consent
- Character lens: what would an honest, fair, caring person do?
- Dilemma: a choice where important values clash
- Stakeholder: anyone who gains or loses from a decision
- Precautionary principle: if serious harm is possible but uncertain, act carefully
- 5 steps: Facts → Stakeholders → Options → Principles → Decide and explain
Worked examples
1. Your best friend copies answers in a test. The teacher asks you if you saw anyone cheating. Use the three lenses.
Consequences: staying silent protects your friend now, but is unfair to students who studied, and your friend learns nothing. Duty: honesty and fairness to the class. Character: a loyal friend can also be honest. A third option: talk to your friend first and encourage them to tell the teacher themselves. Loyalty and honesty are both kept as much as possible.
2. A city wants smart cameras that recognise faces in every street. Make a stakeholder map.
Gain: police (find suspects), shop owners (less theft), some citizens (feel safer), the camera company (profit). Lose: people wrongly matched (risk of arrest), protesters and journalists (may fear being tracked), everyone's privacy. Conclusion: if used at all, strict rules are needed: limited use, independent checks, deletion of data.
3. Is it fair for a factory to replace 100 workers with robots?
Facts: robots cut costs and accidents. Stakeholders: owners, buyers (cheaper goods), the 100 workers, their families. Options: replace all at once; replace slowly while retraining workers; keep workers in new roles. Principles: consequences favour efficiency but also harm workers; duty to treat workers fairly. A fair decision: automate with notice, training and support.
4. A student says: "Animals are not humans, so how we treat them does not matter morally." Respond.
Many animals can feel pain and fear. The consequences lens counts all suffering, not just human suffering. Even if animals do not have the same rights as humans, causing needless pain shows cruelty, a bad character trait. So how we treat animals does matter, even if people disagree about how much.
Common mistakes
- Thinking ethics is just personal opinion. Reasons, facts and principles can make some answers much better than others.
- Looking only at one lens, such as results, and ignoring rights or character.
- Seeing only two options. Good moral thinking searches for a third way.
- Forgetting silent stakeholders: animals, nature, future generations and people far away.