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On What MattersVolume One$
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Derek Parfit

Print publication date: 2011

Print ISBN-13: 9780199572809

Published to Oxford Scholarship Online: May 2015

DOI: 10.1093/acprof:osobl/9780199572809.001.0001

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(p.404) 17 Conclusions
On What Matters

Derek Parfit

Oxford University Press

This concluding chapter presents a philosophical discussion of Immanuel Kant's consequentialism and contractualism. It first considers Act Consequentialism, which says everyone ought always to do, or try to do, whatever would make things go best. It then asks whether this principle is universal acceptance-optimific, by being the principle whose universal acceptance would make things go best. It also examines the universal acceptance version of Rule Consequentialism, that is: Everyone ought to follow the principles of which it is true that, if they were universally followed, things would go best. Finally, it analyses Kant's contractualism, which says everyone ought to follow the principles that everyone could rationally will to be universal laws, as well as his Formula of the Greatest Good and Triple Theory.

Keywords:   consequentialism, Immanuel Kant, Act Consequentialism, universal acceptance, Rule Consequentialism, contractualism, universal laws, Formula of the Greatest Good, Triple Theory

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