Philosophy › Section I · Normative moral theory › Topic I.1

What a normative moral theory requires

Everyone has moral opinions; a moral theory tries to organise them into a system that explains why right acts are right and helps us decide hard cases. Before comparing the major theories, it helps to know what job a theory is meant to do and how to judge whether it does it well.

In this topic

  • From opinions to theory
  • Three areas of ethics
  • What a theory must supply
  • Criterion versus decision procedure
  • Standards for judging a theory
  • Reflective equilibrium
  • Worked example: testing a simple theory
  • The main families of theory
  • Worked example: one case, three verdicts
  • Is any theory possible?
  • Common mistakes to avoid
  • Key takeaways

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