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Derek Parfit.

Philosopher and author of Reasons and Persons whose work examines identity, rationality and population ethics.

Collective Decisions ↗Philosophy & Ethics ↗

Associated with

01Interactive

Repugnant Conclusion

Compare population sizes and well-being under total and average evaluations.

Philosophy & EthicsCollective Decisions

Associated with Derek Parfit

02Interactive

Non-Identity Problem

Change whether a policy affects the same future person or who comes to exist.

Philosophy & EthicsCollective Decisions

Associated with Derek Parfit

These relationships distinguish discussion, development, and popularization; they do not imply sole invention. Effect pages include supporting references where verified and label provisional associations.