This essay traces Christian thinking about sacred and secular authority during the early centuries of the Roman Empire. Christian martyrdom, interpreted by apologists such as Tertullian, established a place for Christianity in Roman society and gave it authority against imperial power. From this confrontation there emerged a differentiation of religious and civil authority that provided a starting point for later constitutional ideas of separate and balanced powers and distinctions between state and civil society. A comparative perspective reminds us, however, that (...) at their beginnings, Islam and Christianity faced quite different questions about religious and political authority. (shrink)

The relationship between God and morality has been a topic of philosophical discussion since Socrates engaged Euthyphro in the agora. In recent years, it has received a lot of attention, as theistic philosophers have attempted to show that divine command theory and other theistic meta‐ethical accounts are defensible. Whether metaphysical naturalism is compatible with moral realism is a related (and equally controversial) topic. This essay surveys the main issues in these debates.