Four different questions arise about a human wrongful action:
1. Possibility: Could the event occur?
2. Creation: To what is its existence ultimately attributed?
3. Moral ruling: Is it permitted or approved?
4. Acquisition: On what basis is the person responsible?
An answer to one question cannot simply be transferred to another. Possibility does not entail moral permission; creation does not entail approval; and human choice does not entail independent power to create.
These four respects organize the controversies covered in this unit.