Can there be an objective morality without God? Derek Parfit argues that it can and offers a theory of morality that is neither theistic nor naturalistic. This book provides a critical assessment of Parfit's metaethical theory. Jakobsen identifies some problems in Parfit's theory - problems concerning moral normativity, the ontological status of morality, and evolutionary influence on our moral beliefs - and argues that theological resources can help solve them. By showing how Parfit's theory may be improved by the help of theology, Jakobsen demonstrates the relevance of theology in philosophical and metaethical debates and argues that Christian theism offers a better explanation of morality than what Parfit's non-naturalism does.