How to Decide What Is Right and Wrong: A Philosophy Guide for Students

Published: April 22, 2026
Last Updated: April 22, 2026

One of the oldest and most fundamental questions in human history is deceptively simple to ask but remarkably difficult to answer. How do we decide what is right and what is wrong? This question sits at the very heart of moral philosophy and has occupied the greatest thinkers across every civilisation, culture, and century.

This guide explores the major philosophical approaches to deciding what is right and wrong. We examine the key ethical theories, the thinkers behind them, their strengths and weaknesses, and how to apply them in your philosophy assignment writing. If you are finding moral philosophy challenging, our expert philosophy writing service uk can support you through every stage of understanding and writing about ethics at the highest academic level.

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Why Is Deciding Right from Wrong So Difficult?

Before exploring the theories, it is worth understanding why moral decision-making is genuinely difficult and not just a matter of common sense or intuition.

Moral Disagreement Is Universal

People disagree about ethics across cultures, religions, political systems, and historical periods. What one society considers morally acceptable, another may consider deeply wrong. This raises the fundamental philosophical question of whether morality is objective — existing independently of human opinion — or subjective, varying between individuals and cultures.

Intuitions Can Be Unreliable

We often feel strongly that something is right or wrong without being able to explain why. Philosophers call these moral intuitions. While intuitions are important data points in ethical reasoning, they can also be shaped by bias, upbringing, cultural conditioning, and limited perspective. Relying on intuition alone is not philosophically sufficient.

Values Can Conflict

Even when people share the same basic values — honesty, fairness, kindness, freedom — those values can conflict in specific situations. Is it right to lie to protect someone's feelings? Is it fair to punish one person to benefit many? Is it kind to prevent someone from making a harmful choice? These conflicts reveal why moral philosophy requires careful theoretical frameworks rather than simple rules.

Context Changes Everything

The same action can seem right in one context and wrong in another. Killing is generally considered wrong, but most ethical frameworks allow for exceptions in self-defence. Lying is generally wrong, but many people would lie to protect an innocent person from harm. Context-sensitivity is one of the most challenging aspects of moral decision-making.

Understanding these difficulties is essential for any serious philosophy homework engagement with ethical theory. 

The Major Philosophical Frameworks for Deciding Right and Wrong

Philosophy has produced several major ethical theories that offer systematic approaches to moral decision-making. Each theory has genuine strengths and significant weaknesses, which is why philosophers continue to debate them and why your philosophy assignment should engage critically with multiple perspectives.

1. Consequentialism — Judge Actions by Their Outcomes

Consequentialism is the view that the moral worth of an action is determined entirely by its consequences. The most famous version is utilitarianism, developed by Jeremy Bentham and refined by John Stuart Mill.

The Core Principle

An action is right if it produces the greatest good for the greatest number of people. Moral decision-making is essentially a calculation: weigh the benefits against the harms, consider all affected parties equally, and choose the action that maximises overall wellbeing or happiness.

Key Thinkers

  • Jeremy Bentham developed the hedonic calculus — a method for measuring pleasure and pain to determine the right action
  • John Stuart Mill refined utilitarianism by distinguishing between higher and lower pleasures, arguing that intellectual pleasures are more valuable than physical ones
  • Peter Singer extended consequentialism to include animal welfare and global poverty, arguing that we have strong moral obligations to reduce suffering wherever it exists

Strengths of Consequentialism

  • It is practical and focused on real-world outcomes
  • It treats all affected parties equally regardless of their relationship to the decision-maker
  • It provides a clear decision-making procedure
  • It captures our intuition that outcomes matter morally

Weaknesses of Consequentialism

  • It can justify deeply unjust actions if they produce good overall results, such as punishing an innocent person to prevent social unrest
  • It is often impossible to predict consequences accurately
  • It ignores rights, duties, and character in favour of outcomes alone
  • It can demand too much, requiring individuals to sacrifice personal wellbeing constantly for the greater good

For students writing about consequentialism in a philosophy assignment, the key is to engage critically with both its appeal and its limitations. Our philosophy homework help can assist with applying consequentialist reasoning to specific ethical cases.

2. Deontology — Judge Actions by Their Conformity to Duty

Deontological ethics holds that certain actions are inherently right or wrong regardless of their consequences. The most influential deontological theory was developed by Immanuel Kant in the 18th century.

The Core Principle

Kant argued that morality is grounded in reason, not outcomes. He developed the concept of the categorical imperative — a universal moral law that applies to all rational beings in all circumstances. The most famous formulation is:

"Act only according to that maxim by which you can at the same time will that it should become a universal law."

In other words, an action is right if you could consistently wish that everyone in a similar situation acted the same way. Kant also argued that people must always be treated as ends in themselves — never merely as means to an end.

Key Thinkers

  • Immanuel Kant — the central figure in deontological ethics
  • W.D. Ross — developed a more flexible deontology based on prima facie duties, including fidelity, gratitude, justice, and non-maleficence
  • Christine Korsgaard — contemporary Kantian philosopher who argues that moral obligations arise from our capacity for rational self-governance

Strengths of Deontology

  • It protects individual rights and dignity regardless of social utility
  • It provides clear, consistent moral rules that do not shift with circumstances
  • It captures our intuition that some actions — like torture or murder — are wrong even when they produce good outcomes
  • It respects human autonomy and rational agency

Weaknesses of Deontology

  • It can produce deeply counterintuitive results — Kant famously argued it is wrong to lie even to a murderer asking where your friend is hiding
  • It struggles to resolve conflicts between duties
  • It ignores the real-world consequences of actions, which many philosophers consider morally relevant
  • Critics argue that Kant's universal laws are too abstract to guide real moral decisions

Deontology is one of the most frequently examined theories in philosophy A level and university ethics courses. Understanding its precise formulations and limitations is essential for strong essay writing.

3. Virtue Ethics — Focus on Character Rather Than Rules or Outcomes

Virtue ethics shifts the focus of moral philosophy away from rules and consequences and towards the character of the moral agent. Rather than asking "what should I do?" it asks "what kind of person should I be?"

The Core Principle

Developed by Aristotle in his Nicomachean Ethics, virtue ethics holds that a good life is one lived in accordance with virtue. Virtues are character traits — such as courage, honesty, justice, generosity, and practical wisdom — that enable human beings to flourish and achieve eudaimonia, often translated as happiness or human flourishing.

The virtuous person does not simply follow rules or calculate outcomes. They have developed moral character through habit and practice, and they exercise practical wisdom (phronesis) to make good judgments in specific situations.

Key Thinkers

  • Aristotle — the founding figure of virtue ethics
  • Alasdair MacIntyre — revived virtue ethics in the 20th century with After Virtue, arguing that modern moral philosophy had lost sight of the importance of character and community
  • Philippa Foot — developed a naturalistic version of virtue ethics grounded in human nature
  • Rosalind Hursthouse — contemporary virtue ethicist who applies the framework to applied ethical issues including abortion and environmental ethics

Strengths of Virtue Ethics

  • It captures the importance of moral character and personal development
  • It recognises the complexity and context-sensitivity of real moral situations
  • It provides a rich account of human flourishing that goes beyond rule-following
  • It acknowledges that being moral is about who you are, not just what you do

Weaknesses of Virtue Ethics

  • It does not provide clear action guidance in specific dilemmas
  • Different cultures identify different virtues, raising questions about moral relativism
  • It can be circular — virtues are what a virtuous person has, but who decides who is virtuous?
  • Critics argue it is too focused on individual character and insufficiently attentive to structural injustice

Virtue ethics is increasingly popular in applied ethics and is particularly relevant for students studying moral education, professional ethics, and political philosophy. If you need support applying virtue ethics to a specific philosophy assignment, our philosophy paper writing service can provide detailed guidance.

4. Contractarianism and Contractualism — Morality as Social Agreement

Social contract theories ground morality in agreements — either actual or hypothetical — between individuals. Different versions of this approach yield very different moral conclusions.

The Core Principle

Contractarianism, associated with Thomas Hobbes and later David Gauthier, holds that moral rules are those that rational self-interested individuals would agree to in order to achieve mutual benefit. Morality is essentially a rational bargain.

Contractualism, developed by John Rawls and T.M. Scanlon, takes a different approach. Rawls argued that principles of justice are those that rational individuals would choose from behind a "veil of ignorance" — not knowing their place in society, their talents, or their values. This thought experiment generates principles of equal basic liberties and fair equality of opportunity.

Scanlon's contractualism holds that an action is wrong if its performance under the circumstances would be disallowed by any set of principles that no one could reasonably reject.

Key Thinkers

  • Thomas Hobbes — argued that without social contract, life is "nasty, brutish, and short"
  • John Locke — grounded the social contract in natural rights
  • Jean-Jacques Rousseau — developed the concept of the general will
  • John Rawls — A Theory of Justice is one of the most influential works in 20th-century moral and political philosophy
  • T.M. Scanlon — developed contractualism as a theory of moral wrongness

Strengths of Contractarian Approaches

  • They explain why morality is in everyone's rational interest
  • Rawls's framework provides a powerful account of justice and equality
  • They respect individual autonomy and the importance of fair procedures
  • They connect moral philosophy to political theory in important ways

Weaknesses of Contractarian Approaches

  • They struggle to account for our obligations to those who cannot participate in agreements — including animals, future generations, and severely cognitively disabled individuals
  • The hypothetical nature of the social contract raises questions about its binding force
  • Different versions of contractarianism yield conflicting moral conclusions

Social contract theories are essential reading for students studying political philosophy and are often required for rationalism assignment help modules that examine the foundations of moral and political reasoning.

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Conclusion

Deciding what is right and wrong is one of the deepest and most challenging questions in all of philosophy. The major ethical theories — consequentialism, deontology, virtue ethics, contractarianism, natural law theory, moral relativism, and care ethics — each offer valuable frameworks for moral reasoning, and each has genuine strengths and significant limitations.

No single theory provides a perfect, universally accepted answer to every moral question. This is precisely why moral philosophy remains a living, evolving discipline — and why engaging with it seriously requires not just knowledge of the theories but the ability to think critically, evaluate arguments honestly, and reason carefully about genuinely difficult questions.

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Frequently Asked Questions

How do philosophers decide what is right and wrong?

Philosophers use systematic ethical frameworks to evaluate moral questions. The major approaches include consequentialism, which judges actions by their outcomes, deontology, which focuses on duties and universal rules, virtue ethics, which emphasises character and human flourishing, and contractarianism, which grounds morality in rational agreement. Each framework offers a different method for moral reasoning and reaches different conclusions in specific cases.

What is the best ethical theory for deciding right from wrong?

There is no single universally accepted best theory. Each major ethical framework captures important moral truths and faces significant objections. Many philosophers argue for a pluralistic approach that draws on multiple theories depending on the situation. Your philosophy homework should engage critically with multiple frameworks rather than simply endorsing one as correct.

What is the difference between ethics and morality in philosophy?

In philosophy, ethics refers to the systematic theoretical study of moral questions, while morality refers to the actual norms, values, and practices that govern right and wrong behaviour. Philosophers use the terms interchangeably in many contexts, but ethics as a discipline encompasses both the theoretical study of moral frameworks and the application of those frameworks to specific practical questions.

How do I write a philosophy essay about right and wrong?

Begin by clearly identifying the moral question, select the most relevant ethical theories, apply them carefully to the specific issue, evaluate their strengths and weaknesses critically, defend a clear position, and address counterarguments. Structure your essay with a clear introduction, well-developed body paragraphs, and a strong conclusion.

What is moral relativism, and is it a valid philosophical position?

Moral relativism is the view that moral judgements are not universally valid but relative to individuals or cultures. While it captures genuine diversity in moral beliefs and promotes cultural humility, most philosophers reject strong versions of relativism because they cannot consistently condemn practices like genocide or slavery as objectively wrong.

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